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Blackfin: SMP: don't start up core b until its state has been completely onlined
[linux/fpc-iii.git] / drivers / char / vt.c
blob1e3d728dbf7e15a9c15664562c1057a376f33434
1 /*
2 * linux/drivers/char/vt.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 */
6
7 /*
8 * Hopefully this will be a rather complete VT102 implementation.
9 *
10 * Beeping thanks to John T Kohl.
11 *
12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
13 * Chars, and VT100 enhancements by Peter MacDonald.
14 *
15 * Copy and paste function by Andrew Haylett,
16 * some enhancements by Alessandro Rubini.
17 *
18 * Code to check for different video-cards mostly by Galen Hunt,
19 * <g-hunt@ee.utah.edu>
20 *
21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>.
23 *
24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994
25 * Resizing of consoles, aeb, 940926
26 *
27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
28 * <poe@daimi.aau.dk>
29 *
30 * User-defined bell sound, new setterm control sequences and printk
31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95
32 *
33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp>
34 *
35 * Merge with the abstract console driver by Geert Uytterhoeven
36 * <geert@linux-m68k.org>, Jan 1997.
37 *
38 * Original m68k console driver modifications by
39 *
40 * - Arno Griffioen <arno@usn.nl>
41 * - David Carter <carter@cs.bris.ac.uk>
42 *
43 * The abstract console driver provides a generic interface for a text
44 * console. It supports VGA text mode, frame buffer based graphical consoles
45 * and special graphics processors that are only accessible through some
46 * registers (e.g. a TMS340x0 GSP).
47 *
48 * The interface to the hardware is specified using a special structure
49 * (struct consw) which contains function pointers to console operations
50 * (see <linux/console.h> for more information).
51 *
52 * Support for changeable cursor shape
53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997
54 *
55 * Ported to i386 and con_scrolldelta fixed
56 * by Emmanuel Marty <core@ggi-project.org>, April 1998
57 *
58 * Resurrected character buffers in videoram plus lots of other trickery
59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
60 *
61 * Removed old-style timers, introduced console_timer, made timer
62 * deletion SMP-safe. 17Jun00, Andrew Morton
63 *
64 * Removed console_lock, enabled interrupts across all console operations
65 * 13 March 2001, Andrew Morton
66 *
67 * Fixed UTF-8 mode so alternate charset modes always work according
68 * to control sequences interpreted in do_con_trol function
69 * preserving backward VT100 semigraphics compatibility,
70 * malformed UTF sequences represented as sequences of replacement glyphs,
71 * original codes or '?' as a last resort if replacement glyph is undefined
72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006
73 */
74
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/sched.h>
78 #include <linux/tty.h>
79 #include <linux/tty_flip.h>
80 #include <linux/kernel.h>
81 #include <linux/string.h>
82 #include <linux/errno.h>
83 #include <linux/kd.h>
84 #include <linux/slab.h>
85 #include <linux/major.h>
86 #include <linux/mm.h>
87 #include <linux/console.h>
88 #include <linux/init.h>
89 #include <linux/mutex.h>
90 #include <linux/vt_kern.h>
91 #include <linux/selection.h>
92 #include <linux/smp_lock.h>
93 #include <linux/tiocl.h>
94 #include <linux/kbd_kern.h>
95 #include <linux/consolemap.h>
96 #include <linux/timer.h>
97 #include <linux/interrupt.h>
98 #include <linux/workqueue.h>
99 #include <linux/pm.h>
100 #include <linux/font.h>
101 #include <linux/bitops.h>
102 #include <linux/notifier.h>
103 #include <linux/device.h>
104 #include <linux/io.h>
105 #include <asm/system.h>
106 #include <linux/uaccess.h>
107
108 #define MAX_NR_CON_DRIVER 16
109
110 #define CON_DRIVER_FLAG_MODULE 1
111 #define CON_DRIVER_FLAG_INIT 2
112 #define CON_DRIVER_FLAG_ATTR 4
113
114 struct con_driver {
115 const struct consw *con;
116 const char *desc;
117 struct device *dev;
118 int node;
119 int first;
120 int last;
121 int flag;
122 };
123
124 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
125 const struct consw *conswitchp;
126
127 /* A bitmap for codes <32. A bit of 1 indicates that the code
128 * corresponding to that bit number invokes some special action
129 * (such as cursor movement) and should not be displayed as a
130 * glyph unless the disp_ctrl mode is explicitly enabled.
131 */
132 #define CTRL_ACTION 0x0d00ff81
133 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */
134
135 /*
136 * Here is the default bell parameters: 750HZ, 1/8th of a second
137 */
138 #define DEFAULT_BELL_PITCH 750
139 #define DEFAULT_BELL_DURATION (HZ/8)
140
141 struct vc vc_cons [MAX_NR_CONSOLES];
142
143 #ifndef VT_SINGLE_DRIVER
144 static const struct consw *con_driver_map[MAX_NR_CONSOLES];
145 #endif
146
147 static int con_open(struct tty_struct *, struct file *);
148 static void vc_init(struct vc_data *vc, unsigned int rows,
149 unsigned int cols, int do_clear);
150 static void gotoxy(struct vc_data *vc, int new_x, int new_y);
151 static void save_cur(struct vc_data *vc);
152 static void reset_terminal(struct vc_data *vc, int do_clear);
153 static void con_flush_chars(struct tty_struct *tty);
154 static int set_vesa_blanking(char __user *p);
155 static void set_cursor(struct vc_data *vc);
156 static void hide_cursor(struct vc_data *vc);
157 static void console_callback(struct work_struct *ignored);
158 static void blank_screen_t(unsigned long dummy);
159 static void set_palette(struct vc_data *vc);
160
161 static int printable; /* Is console ready for printing? */
162 int default_utf8 = true;
163 module_param(default_utf8, int, S_IRUGO | S_IWUSR);
164 int global_cursor_default = -1;
165 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
166
167 /*
168 * ignore_poke: don't unblank the screen when things are typed. This is
169 * mainly for the privacy of braille terminal users.
170 */
171 static int ignore_poke;
172
173 int do_poke_blanked_console;
174 int console_blanked;
175
176 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
177 static int vesa_off_interval;
178 static int blankinterval = 10*60;
179 core_param(consoleblank, blankinterval, int, 0444);
180
181 static DECLARE_WORK(console_work, console_callback);
182
183 /*
184 * fg_console is the current virtual console,
185 * last_console is the last used one,
186 * want_console is the console we want to switch to,
187 * kmsg_redirect is the console for kernel messages,
188 */
189 int fg_console;
190 int last_console;
191 int want_console = -1;
192 int kmsg_redirect;
193
194 /*
195 * For each existing display, we have a pointer to console currently visible
196 * on that display, allowing consoles other than fg_console to be refreshed
197 * appropriately. Unless the low-level driver supplies its own display_fg
198 * variable, we use this one for the "master display".
199 */
200 static struct vc_data *master_display_fg;
201
202 /*
203 * Unfortunately, we need to delay tty echo when we're currently writing to the
204 * console since the code is (and always was) not re-entrant, so we schedule
205 * all flip requests to process context with schedule-task() and run it from
206 * console_callback().
207 */
208
209 /*
210 * For the same reason, we defer scrollback to the console callback.
211 */
212 static int scrollback_delta;
213
214 /*
215 * Hook so that the power management routines can (un)blank
216 * the console on our behalf.
217 */
218 int (*console_blank_hook)(int);
219
220 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0);
221 static int blank_state;
222 static int blank_timer_expired;
223 enum {
224 blank_off = 0,
225 blank_normal_wait,
226 blank_vesa_wait,
227 };
228
229 /*
230 * Notifier list for console events.
231 */
232 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
233
234 int register_vt_notifier(struct notifier_block *nb)
235 {
236 return atomic_notifier_chain_register(&vt_notifier_list, nb);
237 }
238 EXPORT_SYMBOL_GPL(register_vt_notifier);
239
240 int unregister_vt_notifier(struct notifier_block *nb)
241 {
242 return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
243 }
244 EXPORT_SYMBOL_GPL(unregister_vt_notifier);
245
246 static void notify_write(struct vc_data *vc, unsigned int unicode)
247 {
248 struct vt_notifier_param param = { .vc = vc, unicode = unicode };
249 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, &param);
250 }
251
252 static void notify_update(struct vc_data *vc)
253 {
254 struct vt_notifier_param param = { .vc = vc };
255 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, &param);
256 }
257 /*
258 * Low-Level Functions
259 */
260
261 #define IS_FG(vc) ((vc)->vc_num == fg_console)
262
263 #ifdef VT_BUF_VRAM_ONLY
264 #define DO_UPDATE(vc) 0
265 #else
266 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
267 #endif
268
269 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
270 {
271 unsigned short *p;
272
273 if (!viewed)
274 p = (unsigned short *)(vc->vc_origin + offset);
275 else if (!vc->vc_sw->con_screen_pos)
276 p = (unsigned short *)(vc->vc_visible_origin + offset);
277 else
278 p = vc->vc_sw->con_screen_pos(vc, offset);
279 return p;
280 }
281
282 static inline void scrolldelta(int lines)
283 {
284 scrollback_delta += lines;
285 schedule_console_callback();
286 }
287
288 void schedule_console_callback(void)
289 {
290 schedule_work(&console_work);
291 }
292
293 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
294 {
295 unsigned short *d, *s;
296
297 if (t+nr >= b)
298 nr = b - t - 1;
299 if (b > vc->vc_rows || t >= b || nr < 1)
300 return;
301 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr))
302 return;
303 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
304 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
305 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
306 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
307 vc->vc_size_row * nr);
308 }
309
310 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr)
311 {
312 unsigned short *s;
313 unsigned int step;
314
315 if (t+nr >= b)
316 nr = b - t - 1;
317 if (b > vc->vc_rows || t >= b || nr < 1)
318 return;
319 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr))
320 return;
321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
322 step = vc->vc_cols * nr;
323 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
324 scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
325 }
326
327 static void do_update_region(struct vc_data *vc, unsigned long start, int count)
328 {
329 #ifndef VT_BUF_VRAM_ONLY
330 unsigned int xx, yy, offset;
331 u16 *p;
332
333 p = (u16 *) start;
334 if (!vc->vc_sw->con_getxy) {
335 offset = (start - vc->vc_origin) / 2;
336 xx = offset % vc->vc_cols;
337 yy = offset / vc->vc_cols;
338 } else {
339 int nxx, nyy;
340 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
341 xx = nxx; yy = nyy;
342 }
343 for(;;) {
344 u16 attrib = scr_readw(p) & 0xff00;
345 int startx = xx;
346 u16 *q = p;
347 while (xx < vc->vc_cols && count) {
348 if (attrib != (scr_readw(p) & 0xff00)) {
349 if (p > q)
350 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
351 startx = xx;
352 q = p;
353 attrib = scr_readw(p) & 0xff00;
354 }
355 p++;
356 xx++;
357 count--;
358 }
359 if (p > q)
360 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
361 if (!count)
362 break;
363 xx = 0;
364 yy++;
365 if (vc->vc_sw->con_getxy) {
366 p = (u16 *)start;
367 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
368 }
369 }
370 #endif
371 }
372
373 void update_region(struct vc_data *vc, unsigned long start, int count)
374 {
375 WARN_CONSOLE_UNLOCKED();
376
377 if (DO_UPDATE(vc)) {
378 hide_cursor(vc);
379 do_update_region(vc, start, count);
380 set_cursor(vc);
381 }
382 }
383
384 /* Structure of attributes is hardware-dependent */
385
386 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink,
387 u8 _underline, u8 _reverse, u8 _italic)
388 {
389 if (vc->vc_sw->con_build_attr)
390 return vc->vc_sw->con_build_attr(vc, _color, _intensity,
391 _blink, _underline, _reverse, _italic);
392
393 #ifndef VT_BUF_VRAM_ONLY
394 /*
395 * ++roman: I completely changed the attribute format for monochrome
396 * mode (!can_do_color). The formerly used MDA (monochrome display
397 * adapter) format didn't allow the combination of certain effects.
398 * Now the attribute is just a bit vector:
399 * Bit 0..1: intensity (0..2)
400 * Bit 2 : underline
401 * Bit 3 : reverse
402 * Bit 7 : blink
403 */
404 {
405 u8 a = _color;
406 if (!vc->vc_can_do_color)
407 return _intensity |
408 (_italic ? 2 : 0) |
409 (_underline ? 4 : 0) |
410 (_reverse ? 8 : 0) |
411 (_blink ? 0x80 : 0);
412 if (_italic)
413 a = (a & 0xF0) | vc->vc_itcolor;
414 else if (_underline)
415 a = (a & 0xf0) | vc->vc_ulcolor;
416 else if (_intensity == 0)
417 a = (a & 0xf0) | vc->vc_ulcolor;
418 if (_reverse)
419 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77);
420 if (_blink)
421 a ^= 0x80;
422 if (_intensity == 2)
423 a ^= 0x08;
424 if (vc->vc_hi_font_mask == 0x100)
425 a <<= 1;
426 return a;
427 }
428 #else
429 return 0;
430 #endif
431 }
432
433 static void update_attr(struct vc_data *vc)
434 {
435 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity,
436 vc->vc_blink, vc->vc_underline,
437 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
438 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
439 }
440
441 /* Note: inverting the screen twice should revert to the original state */
442 void invert_screen(struct vc_data *vc, int offset, int count, int viewed)
443 {
444 unsigned short *p;
445
446 WARN_CONSOLE_UNLOCKED();
447
448 count /= 2;
449 p = screenpos(vc, offset, viewed);
450 if (vc->vc_sw->con_invert_region)
451 vc->vc_sw->con_invert_region(vc, p, count);
452 #ifndef VT_BUF_VRAM_ONLY
453 else {
454 u16 *q = p;
455 int cnt = count;
456 u16 a;
457
458 if (!vc->vc_can_do_color) {
459 while (cnt--) {
460 a = scr_readw(q);
461 a ^= 0x0800;
462 scr_writew(a, q);
463 q++;
464 }
465 } else if (vc->vc_hi_font_mask == 0x100) {
466 while (cnt--) {
467 a = scr_readw(q);
468 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4);
469 scr_writew(a, q);
470 q++;
471 }
472 } else {
473 while (cnt--) {
474 a = scr_readw(q);
475 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
476 scr_writew(a, q);
477 q++;
478 }
479 }
480 }
481 #endif
482 if (DO_UPDATE(vc))
483 do_update_region(vc, (unsigned long) p, count);
484 }
485
486 /* used by selection: complement pointer position */
487 void complement_pos(struct vc_data *vc, int offset)
488 {
489 static int old_offset = -1;
490 static unsigned short old;
491 static unsigned short oldx, oldy;
492
493 WARN_CONSOLE_UNLOCKED();
494
495 if (old_offset != -1 && old_offset >= 0 &&
496 old_offset < vc->vc_screenbuf_size) {
497 scr_writew(old, screenpos(vc, old_offset, 1));
498 if (DO_UPDATE(vc))
499 vc->vc_sw->con_putc(vc, old, oldy, oldx);
500 }
501
502 old_offset = offset;
503
504 if (offset != -1 && offset >= 0 &&
505 offset < vc->vc_screenbuf_size) {
506 unsigned short new;
507 unsigned short *p;
508 p = screenpos(vc, offset, 1);
509 old = scr_readw(p);
510 new = old ^ vc->vc_complement_mask;
511 scr_writew(new, p);
512 if (DO_UPDATE(vc)) {
513 oldx = (offset >> 1) % vc->vc_cols;
514 oldy = (offset >> 1) / vc->vc_cols;
515 vc->vc_sw->con_putc(vc, new, oldy, oldx);
516 }
517 }
518
519 }
520
521 static void insert_char(struct vc_data *vc, unsigned int nr)
522 {
523 unsigned short *p, *q = (unsigned short *)vc->vc_pos;
524
525 p = q + vc->vc_cols - nr - vc->vc_x;
526 while (--p >= q)
527 scr_writew(scr_readw(p), p + nr);
528 scr_memsetw(q, vc->vc_video_erase_char, nr * 2);
529 vc->vc_need_wrap = 0;
530 if (DO_UPDATE(vc)) {
531 unsigned short oldattr = vc->vc_attr;
532 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1,
533 vc->vc_cols - vc->vc_x - nr);
534 vc->vc_attr = vc->vc_video_erase_char >> 8;
535 while (nr--)
536 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr);
537 vc->vc_attr = oldattr;
538 }
539 }
540
541 static void delete_char(struct vc_data *vc, unsigned int nr)
542 {
543 unsigned int i = vc->vc_x;
544 unsigned short *p = (unsigned short *)vc->vc_pos;
545
546 while (++i <= vc->vc_cols - nr) {
547 scr_writew(scr_readw(p+nr), p);
548 p++;
549 }
550 scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
551 vc->vc_need_wrap = 0;
552 if (DO_UPDATE(vc)) {
553 unsigned short oldattr = vc->vc_attr;
554 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1,
555 vc->vc_cols - vc->vc_x - nr);
556 vc->vc_attr = vc->vc_video_erase_char >> 8;
557 while (nr--)
558 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y,
559 vc->vc_cols - 1 - nr);
560 vc->vc_attr = oldattr;
561 }
562 }
563
564 static int softcursor_original;
565
566 static void add_softcursor(struct vc_data *vc)
567 {
568 int i = scr_readw((u16 *) vc->vc_pos);
569 u32 type = vc->vc_cursor_type;
570
571 if (! (type & 0x10)) return;
572 if (softcursor_original != -1) return;
573 softcursor_original = i;
574 i |= ((type >> 8) & 0xff00 );
575 i ^= ((type) & 0xff00 );
576 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000;
577 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700;
578 scr_writew(i, (u16 *) vc->vc_pos);
579 if (DO_UPDATE(vc))
580 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x);
581 }
582
583 static void hide_softcursor(struct vc_data *vc)
584 {
585 if (softcursor_original != -1) {
586 scr_writew(softcursor_original, (u16 *)vc->vc_pos);
587 if (DO_UPDATE(vc))
588 vc->vc_sw->con_putc(vc, softcursor_original,
589 vc->vc_y, vc->vc_x);
590 softcursor_original = -1;
591 }
592 }
593
594 static void hide_cursor(struct vc_data *vc)
595 {
596 if (vc == sel_cons)
597 clear_selection();
598 vc->vc_sw->con_cursor(vc, CM_ERASE);
599 hide_softcursor(vc);
600 }
601
602 static void set_cursor(struct vc_data *vc)
603 {
604 if (!IS_FG(vc) || console_blanked ||
605 vc->vc_mode == KD_GRAPHICS)
606 return;
607 if (vc->vc_deccm) {
608 if (vc == sel_cons)
609 clear_selection();
610 add_softcursor(vc);
611 if ((vc->vc_cursor_type & 0x0f) != 1)
612 vc->vc_sw->con_cursor(vc, CM_DRAW);
613 } else
614 hide_cursor(vc);
615 }
616
617 static void set_origin(struct vc_data *vc)
618 {
619 WARN_CONSOLE_UNLOCKED();
620
621 if (!CON_IS_VISIBLE(vc) ||
622 !vc->vc_sw->con_set_origin ||
623 !vc->vc_sw->con_set_origin(vc))
624 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
625 vc->vc_visible_origin = vc->vc_origin;
626 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
627 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x;
628 }
629
630 static inline void save_screen(struct vc_data *vc)
631 {
632 WARN_CONSOLE_UNLOCKED();
633
634 if (vc->vc_sw->con_save_screen)
635 vc->vc_sw->con_save_screen(vc);
636 }
637
638 /*
639 * Redrawing of screen
640 */
641
642 static void clear_buffer_attributes(struct vc_data *vc)
643 {
644 unsigned short *p = (unsigned short *)vc->vc_origin;
645 int count = vc->vc_screenbuf_size / 2;
646 int mask = vc->vc_hi_font_mask | 0xff;
647
648 for (; count > 0; count--, p++) {
649 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
650 }
651 }
652
653 void redraw_screen(struct vc_data *vc, int is_switch)
654 {
655 int redraw = 0;
656
657 WARN_CONSOLE_UNLOCKED();
658
659 if (!vc) {
660 /* strange ... */
661 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
662 return;
663 }
664
665 if (is_switch) {
666 struct vc_data *old_vc = vc_cons[fg_console].d;
667 if (old_vc == vc)
668 return;
669 if (!CON_IS_VISIBLE(vc))
670 redraw = 1;
671 *vc->vc_display_fg = vc;
672 fg_console = vc->vc_num;
673 hide_cursor(old_vc);
674 if (!CON_IS_VISIBLE(old_vc)) {
675 save_screen(old_vc);
676 set_origin(old_vc);
677 }
678 } else {
679 hide_cursor(vc);
680 redraw = 1;
681 }
682
683 if (redraw) {
684 int update;
685 int old_was_color = vc->vc_can_do_color;
686
687 set_origin(vc);
688 update = vc->vc_sw->con_switch(vc);
689 set_palette(vc);
690 /*
691 * If console changed from mono<->color, the best we can do
692 * is to clear the buffer attributes. As it currently stands,
693 * rebuilding new attributes from the old buffer is not doable
694 * without overly complex code.
695 */
696 if (old_was_color != vc->vc_can_do_color) {
697 update_attr(vc);
698 clear_buffer_attributes(vc);
699 }
700 if (update && vc->vc_mode != KD_GRAPHICS)
701 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
702 }
703 set_cursor(vc);
704 if (is_switch) {
705 set_leds();
706 compute_shiftstate();
707 notify_update(vc);
708 }
709 }
710
711 /*
712 * Allocation, freeing and resizing of VTs.
713 */
714
715 int vc_cons_allocated(unsigned int i)
716 {
717 return (i < MAX_NR_CONSOLES && vc_cons[i].d);
718 }
719
720 static void visual_init(struct vc_data *vc, int num, int init)
721 {
722 /* ++Geert: vc->vc_sw->con_init determines console size */
723 if (vc->vc_sw)
724 module_put(vc->vc_sw->owner);
725 vc->vc_sw = conswitchp;
726 #ifndef VT_SINGLE_DRIVER
727 if (con_driver_map[num])
728 vc->vc_sw = con_driver_map[num];
729 #endif
730 __module_get(vc->vc_sw->owner);
731 vc->vc_num = num;
732 vc->vc_display_fg = &master_display_fg;
733 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
734 vc->vc_uni_pagedir = 0;
735 vc->vc_hi_font_mask = 0;
736 vc->vc_complement_mask = 0;
737 vc->vc_can_do_color = 0;
738 vc->vc_sw->con_init(vc, init);
739 if (!vc->vc_complement_mask)
740 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
741 vc->vc_s_complement_mask = vc->vc_complement_mask;
742 vc->vc_size_row = vc->vc_cols << 1;
743 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
744 }
745
746 int vc_allocate(unsigned int currcons) /* return 0 on success */
747 {
748 WARN_CONSOLE_UNLOCKED();
749
750 if (currcons >= MAX_NR_CONSOLES)
751 return -ENXIO;
752 if (!vc_cons[currcons].d) {
753 struct vc_data *vc;
754 struct vt_notifier_param param;
755
756 /* prevent users from taking too much memory */
757 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
758 return -EPERM;
759
760 /* due to the granularity of kmalloc, we waste some memory here */
761 /* the alloc is done in two steps, to optimize the common situation
762 of a 25x80 console (structsize=216, screenbuf_size=4000) */
763 /* although the numbers above are not valid since long ago, the
764 point is still up-to-date and the comment still has its value
765 even if only as a historical artifact. --mj, July 1998 */
766 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
767 if (!vc)
768 return -ENOMEM;
769 vc_cons[currcons].d = vc;
770 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
771 visual_init(vc, currcons, 1);
772 if (!*vc->vc_uni_pagedir_loc)
773 con_set_default_unimap(vc);
774 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
775 if (!vc->vc_screenbuf) {
776 kfree(vc);
777 vc_cons[currcons].d = NULL;
778 return -ENOMEM;
779 }
780
781 /* If no drivers have overridden us and the user didn't pass a
782 boot option, default to displaying the cursor */
783 if (global_cursor_default == -1)
784 global_cursor_default = 1;
785
786 vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
787 vcs_make_sysfs(currcons);
788 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, &param);
789 }
790 return 0;
791 }
792
793 static inline int resize_screen(struct vc_data *vc, int width, int height,
794 int user)
795 {
796 /* Resizes the resolution of the display adapater */
797 int err = 0;
798
799 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize)
800 err = vc->vc_sw->con_resize(vc, width, height, user);
801
802 return err;
803 }
804
805 /*
806 * Change # of rows and columns (0 means unchanged/the size of fg_console)
807 * [this is to be used together with some user program
808 * like resize that changes the hardware videomode]
809 */
810 #define VC_RESIZE_MAXCOL (32767)
811 #define VC_RESIZE_MAXROW (32767)
812
813 /**
814 * vc_do_resize - resizing method for the tty
815 * @tty: tty being resized
816 * @real_tty: real tty (different to tty if a pty/tty pair)
817 * @vc: virtual console private data
818 * @cols: columns
819 * @lines: lines
820 *
821 * Resize a virtual console, clipping according to the actual constraints.
822 * If the caller passes a tty structure then update the termios winsize
823 * information and perform any neccessary signal handling.
824 *
825 * Caller must hold the console semaphore. Takes the termios mutex and
826 * ctrl_lock of the tty IFF a tty is passed.
827 */
828
829 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
830 unsigned int cols, unsigned int lines)
831 {
832 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
833 unsigned int old_cols, old_rows, old_row_size, old_screen_size;
834 unsigned int new_cols, new_rows, new_row_size, new_screen_size;
835 unsigned int end, user;
836 unsigned short *newscreen;
837
838 WARN_CONSOLE_UNLOCKED();
839
840 if (!vc)
841 return -ENXIO;
842
843 user = vc->vc_resize_user;
844 vc->vc_resize_user = 0;
845
846 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
847 return -EINVAL;
848
849 new_cols = (cols ? cols : vc->vc_cols);
850 new_rows = (lines ? lines : vc->vc_rows);
851 new_row_size = new_cols << 1;
852 new_screen_size = new_row_size * new_rows;
853
854 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
855 return 0;
856
857 newscreen = kmalloc(new_screen_size, GFP_USER);
858 if (!newscreen)
859 return -ENOMEM;
860
861 old_rows = vc->vc_rows;
862 old_cols = vc->vc_cols;
863 old_row_size = vc->vc_size_row;
864 old_screen_size = vc->vc_screenbuf_size;
865
866 err = resize_screen(vc, new_cols, new_rows, user);
867 if (err) {
868 kfree(newscreen);
869 return err;
870 }
871
872 vc->vc_rows = new_rows;
873 vc->vc_cols = new_cols;
874 vc->vc_size_row = new_row_size;
875 vc->vc_screenbuf_size = new_screen_size;
876
877 rlth = min(old_row_size, new_row_size);
878 rrem = new_row_size - rlth;
879 old_origin = vc->vc_origin;
880 new_origin = (long) newscreen;
881 new_scr_end = new_origin + new_screen_size;
882
883 if (vc->vc_y > new_rows) {
884 if (old_rows - vc->vc_y < new_rows) {
885 /*
886 * Cursor near the bottom, copy contents from the
887 * bottom of buffer
888 */
889 old_origin += (old_rows - new_rows) * old_row_size;
890 end = vc->vc_scr_end;
891 } else {
892 /*
893 * Cursor is in no man's land, copy 1/2 screenful
894 * from the top and bottom of cursor position
895 */
896 old_origin += (vc->vc_y - new_rows/2) * old_row_size;
897 end = old_origin + (old_row_size * new_rows);
898 }
899 } else
900 /*
901 * Cursor near the top, copy contents from the top of buffer
902 */
903 end = (old_rows > new_rows) ? old_origin +
904 (old_row_size * new_rows) :
905 vc->vc_scr_end;
906
907 update_attr(vc);
908
909 while (old_origin < end) {
910 scr_memcpyw((unsigned short *) new_origin,
911 (unsigned short *) old_origin, rlth);
912 if (rrem)
913 scr_memsetw((void *)(new_origin + rlth),
914 vc->vc_video_erase_char, rrem);
915 old_origin += old_row_size;
916 new_origin += new_row_size;
917 }
918 if (new_scr_end > new_origin)
919 scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
920 new_scr_end - new_origin);
921 kfree(vc->vc_screenbuf);
922 vc->vc_screenbuf = newscreen;
923 vc->vc_screenbuf_size = new_screen_size;
924 set_origin(vc);
925
926 /* do part of a reset_terminal() */
927 vc->vc_top = 0;
928 vc->vc_bottom = vc->vc_rows;
929 gotoxy(vc, vc->vc_x, vc->vc_y);
930 save_cur(vc);
931
932 if (tty) {
933 /* Rewrite the requested winsize data with the actual
934 resulting sizes */
935 struct winsize ws;
936 memset(&ws, 0, sizeof(ws));
937 ws.ws_row = vc->vc_rows;
938 ws.ws_col = vc->vc_cols;
939 ws.ws_ypixel = vc->vc_scan_lines;
940 tty_do_resize(tty, &ws);
941 }
942
943 if (CON_IS_VISIBLE(vc))
944 update_screen(vc);
945 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
946 return err;
947 }
948
949 /**
950 * vc_resize - resize a VT
951 * @vc: virtual console
952 * @cols: columns
953 * @rows: rows
954 *
955 * Resize a virtual console as seen from the console end of things. We
956 * use the common vc_do_resize methods to update the structures. The
957 * caller must hold the console sem to protect console internals and
958 * vc->vc_tty
959 */
960
961 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
962 {
963 return vc_do_resize(vc->vc_tty, vc, cols, rows);
964 }
965
966 /**
967 * vt_resize - resize a VT
968 * @tty: tty to resize
969 * @ws: winsize attributes
970 *
971 * Resize a virtual terminal. This is called by the tty layer as we
972 * register our own handler for resizing. The mutual helper does all
973 * the actual work.
974 *
975 * Takes the console sem and the called methods then take the tty
976 * termios_mutex and the tty ctrl_lock in that order.
977 */
978 static int vt_resize(struct tty_struct *tty, struct winsize *ws)
979 {
980 struct vc_data *vc = tty->driver_data;
981 int ret;
982
983 acquire_console_sem();
984 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
985 release_console_sem();
986 return ret;
987 }
988
989 void vc_deallocate(unsigned int currcons)
990 {
991 WARN_CONSOLE_UNLOCKED();
992
993 if (vc_cons_allocated(currcons)) {
994 struct vc_data *vc = vc_cons[currcons].d;
995 struct vt_notifier_param param = { .vc = vc };
996
997 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, &param);
998 vcs_remove_sysfs(currcons);
999 vc->vc_sw->con_deinit(vc);
1000 put_pid(vc->vt_pid);
1001 module_put(vc->vc_sw->owner);
1002 kfree(vc->vc_screenbuf);
1003 if (currcons >= MIN_NR_CONSOLES)
1004 kfree(vc);
1005 vc_cons[currcons].d = NULL;
1006 }
1007 }
1008
1009 /*
1010 * VT102 emulator
1011 */
1012
1013 #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1014 #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1015 #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x))
1016
1017 #define decarm VC_REPEAT
1018 #define decckm VC_CKMODE
1019 #define kbdapplic VC_APPLIC
1020 #define lnm VC_CRLF
1021
1022 /*
1023 * this is what the terminal answers to a ESC-Z or csi0c query.
1024 */
1025 #define VT100ID "\033[?1;2c"
1026 #define VT102ID "\033[?6c"
1027
1028 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
1029 8,12,10,14, 9,13,11,15 };
1030
1031 /* the default colour table, for VGA+ colour systems */
1032 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa,
1033 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff};
1034 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa,
1035 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff};
1036 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa,
1037 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff};
1038
1039 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR);
1040 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR);
1041 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR);
1042
1043 /*
1044 * gotoxy() must verify all boundaries, because the arguments
1045 * might also be negative. If the given position is out of
1046 * bounds, the cursor is placed at the nearest margin.
1047 */
1048 static void gotoxy(struct vc_data *vc, int new_x, int new_y)
1049 {
1050 int min_y, max_y;
1051
1052 if (new_x < 0)
1053 vc->vc_x = 0;
1054 else {
1055 if (new_x >= vc->vc_cols)
1056 vc->vc_x = vc->vc_cols - 1;
1057 else
1058 vc->vc_x = new_x;
1059 }
1060
1061 if (vc->vc_decom) {
1062 min_y = vc->vc_top;
1063 max_y = vc->vc_bottom;
1064 } else {
1065 min_y = 0;
1066 max_y = vc->vc_rows;
1067 }
1068 if (new_y < min_y)
1069 vc->vc_y = min_y;
1070 else if (new_y >= max_y)
1071 vc->vc_y = max_y - 1;
1072 else
1073 vc->vc_y = new_y;
1074 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1);
1075 vc->vc_need_wrap = 0;
1076 }
1077
1078 /* for absolute user moves, when decom is set */
1079 static void gotoxay(struct vc_data *vc, int new_x, int new_y)
1080 {
1081 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
1082 }
1083
1084 void scrollback(struct vc_data *vc, int lines)
1085 {
1086 if (!lines)
1087 lines = vc->vc_rows / 2;
1088 scrolldelta(-lines);
1089 }
1090
1091 void scrollfront(struct vc_data *vc, int lines)
1092 {
1093 if (!lines)
1094 lines = vc->vc_rows / 2;
1095 scrolldelta(lines);
1096 }
1097
1098 static void lf(struct vc_data *vc)
1099 {
1100 /* don't scroll if above bottom of scrolling region, or
1101 * if below scrolling region
1102 */
1103 if (vc->vc_y + 1 == vc->vc_bottom)
1104 scrup(vc, vc->vc_top, vc->vc_bottom, 1);
1105 else if (vc->vc_y < vc->vc_rows - 1) {
1106 vc->vc_y++;
1107 vc->vc_pos += vc->vc_size_row;
1108 }
1109 vc->vc_need_wrap = 0;
1110 notify_write(vc, '\n');
1111 }
1112
1113 static void ri(struct vc_data *vc)
1114 {
1115 /* don't scroll if below top of scrolling region, or
1116 * if above scrolling region
1117 */
1118 if (vc->vc_y == vc->vc_top)
1119 scrdown(vc, vc->vc_top, vc->vc_bottom, 1);
1120 else if (vc->vc_y > 0) {
1121 vc->vc_y--;
1122 vc->vc_pos -= vc->vc_size_row;
1123 }
1124 vc->vc_need_wrap = 0;
1125 }
1126
1127 static inline void cr(struct vc_data *vc)
1128 {
1129 vc->vc_pos -= vc->vc_x << 1;
1130 vc->vc_need_wrap = vc->vc_x = 0;
1131 notify_write(vc, '\r');
1132 }
1133
1134 static inline void bs(struct vc_data *vc)
1135 {
1136 if (vc->vc_x) {
1137 vc->vc_pos -= 2;
1138 vc->vc_x--;
1139 vc->vc_need_wrap = 0;
1140 notify_write(vc, '\b');
1141 }
1142 }
1143
1144 static inline void del(struct vc_data *vc)
1145 {
1146 /* ignored */
1147 }
1148
1149 static void csi_J(struct vc_data *vc, int vpar)
1150 {
1151 unsigned int count;
1152 unsigned short * start;
1153
1154 switch (vpar) {
1155 case 0: /* erase from cursor to end of display */
1156 count = (vc->vc_scr_end - vc->vc_pos) >> 1;
1157 start = (unsigned short *)vc->vc_pos;
1158 if (DO_UPDATE(vc)) {
1159 /* do in two stages */
1160 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1161 vc->vc_cols - vc->vc_x);
1162 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0,
1163 vc->vc_rows - vc->vc_y - 1,
1164 vc->vc_cols);
1165 }
1166 break;
1167 case 1: /* erase from start to cursor */
1168 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
1169 start = (unsigned short *)vc->vc_origin;
1170 if (DO_UPDATE(vc)) {
1171 /* do in two stages */
1172 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y,
1173 vc->vc_cols);
1174 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1175 vc->vc_x + 1);
1176 }
1177 break;
1178 case 2: /* erase whole display */
1179 count = vc->vc_cols * vc->vc_rows;
1180 start = (unsigned short *)vc->vc_origin;
1181 if (DO_UPDATE(vc))
1182 vc->vc_sw->con_clear(vc, 0, 0,
1183 vc->vc_rows,
1184 vc->vc_cols);
1185 break;
1186 default:
1187 return;
1188 }
1189 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1190 vc->vc_need_wrap = 0;
1191 }
1192
1193 static void csi_K(struct vc_data *vc, int vpar)
1194 {
1195 unsigned int count;
1196 unsigned short * start;
1197
1198 switch (vpar) {
1199 case 0: /* erase from cursor to end of line */
1200 count = vc->vc_cols - vc->vc_x;
1201 start = (unsigned short *)vc->vc_pos;
1202 if (DO_UPDATE(vc))
1203 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1,
1204 vc->vc_cols - vc->vc_x);
1205 break;
1206 case 1: /* erase from start of line to cursor */
1207 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1208 count = vc->vc_x + 1;
1209 if (DO_UPDATE(vc))
1210 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1211 vc->vc_x + 1);
1212 break;
1213 case 2: /* erase whole line */
1214 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1));
1215 count = vc->vc_cols;
1216 if (DO_UPDATE(vc))
1217 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1,
1218 vc->vc_cols);
1219 break;
1220 default:
1221 return;
1222 }
1223 scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
1224 vc->vc_need_wrap = 0;
1225 }
1226
1227 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */
1228 { /* not vt100? */
1229 int count;
1230
1231 if (!vpar)
1232 vpar++;
1233 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar;
1234
1235 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
1236 if (DO_UPDATE(vc))
1237 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count);
1238 vc->vc_need_wrap = 0;
1239 }
1240
1241 static void default_attr(struct vc_data *vc)
1242 {
1243 vc->vc_intensity = 1;
1244 vc->vc_italic = 0;
1245 vc->vc_underline = 0;
1246 vc->vc_reverse = 0;
1247 vc->vc_blink = 0;
1248 vc->vc_color = vc->vc_def_color;
1249 }
1250
1251 /* console_sem is held */
1252 static void csi_m(struct vc_data *vc)
1253 {
1254 int i;
1255
1256 for (i = 0; i <= vc->vc_npar; i++)
1257 switch (vc->vc_par[i]) {
1258 case 0: /* all attributes off */
1259 default_attr(vc);
1260 break;
1261 case 1:
1262 vc->vc_intensity = 2;
1263 break;
1264 case 2:
1265 vc->vc_intensity = 0;
1266 break;
1267 case 3:
1268 vc->vc_italic = 1;
1269 break;
1270 case 4:
1271 vc->vc_underline = 1;
1272 break;
1273 case 5:
1274 vc->vc_blink = 1;
1275 break;
1276 case 7:
1277 vc->vc_reverse = 1;
1278 break;
1279 case 10: /* ANSI X3.64-1979 (SCO-ish?)
1280 * Select primary font, don't display
1281 * control chars if defined, don't set
1282 * bit 8 on output.
1283 */
1284 vc->vc_translate = set_translate(vc->vc_charset == 0
1285 ? vc->vc_G0_charset
1286 : vc->vc_G1_charset, vc);
1287 vc->vc_disp_ctrl = 0;
1288 vc->vc_toggle_meta = 0;
1289 break;
1290 case 11: /* ANSI X3.64-1979 (SCO-ish?)
1291 * Select first alternate font, lets
1292 * chars < 32 be displayed as ROM chars.
1293 */
1294 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1295 vc->vc_disp_ctrl = 1;
1296 vc->vc_toggle_meta = 0;
1297 break;
1298 case 12: /* ANSI X3.64-1979 (SCO-ish?)
1299 * Select second alternate font, toggle
1300 * high bit before displaying as ROM char.
1301 */
1302 vc->vc_translate = set_translate(IBMPC_MAP, vc);
1303 vc->vc_disp_ctrl = 1;
1304 vc->vc_toggle_meta = 1;
1305 break;
1306 case 21:
1307 case 22:
1308 vc->vc_intensity = 1;
1309 break;
1310 case 23:
1311 vc->vc_italic = 0;
1312 break;
1313 case 24:
1314 vc->vc_underline = 0;
1315 break;
1316 case 25:
1317 vc->vc_blink = 0;
1318 break;
1319 case 27:
1320 vc->vc_reverse = 0;
1321 break;
1322 case 38: /* ANSI X3.64-1979 (SCO-ish?)
1323 * Enables underscore, white foreground
1324 * with white underscore (Linux - use
1325 * default foreground).
1326 */
1327 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1328 vc->vc_underline = 1;
1329 break;
1330 case 39: /* ANSI X3.64-1979 (SCO-ish?)
1331 * Disable underline option.
1332 * Reset colour to default? It did this
1333 * before...
1334 */
1335 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
1336 vc->vc_underline = 0;
1337 break;
1338 case 49:
1339 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
1340 break;
1341 default:
1342 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
1343 vc->vc_color = color_table[vc->vc_par[i] - 30]
1344 | (vc->vc_color & 0xf0);
1345 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
1346 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4)
1347 | (vc->vc_color & 0x0f);
1348 break;
1349 }
1350 update_attr(vc);
1351 }
1352
1353 static void respond_string(const char *p, struct tty_struct *tty)
1354 {
1355 while (*p) {
1356 tty_insert_flip_char(tty, *p, 0);
1357 p++;
1358 }
1359 con_schedule_flip(tty);
1360 }
1361
1362 static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
1363 {
1364 char buf[40];
1365
1366 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1);
1367 respond_string(buf, tty);
1368 }
1369
1370 static inline void status_report(struct tty_struct *tty)
1371 {
1372 respond_string("\033[0n", tty); /* Terminal ok */
1373 }
1374
1375 static inline void respond_ID(struct tty_struct * tty)
1376 {
1377 respond_string(VT102ID, tty);
1378 }
1379
1380 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
1381 {
1382 char buf[8];
1383
1384 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx),
1385 (char)('!' + mry));
1386 respond_string(buf, tty);
1387 }
1388
1389 /* invoked via ioctl(TIOCLINUX) and through set_selection */
1390 int mouse_reporting(void)
1391 {
1392 return vc_cons[fg_console].d->vc_report_mouse;
1393 }
1394
1395 /* console_sem is held */
1396 static void set_mode(struct vc_data *vc, int on_off)
1397 {
1398 int i;
1399
1400 for (i = 0; i <= vc->vc_npar; i++)
1401 if (vc->vc_ques) {
1402 switch(vc->vc_par[i]) { /* DEC private modes set/reset */
1403 case 1: /* Cursor keys send ^[Ox/^[[x */
1404 if (on_off)
1405 set_kbd(vc, decckm);
1406 else
1407 clr_kbd(vc, decckm);
1408 break;
1409 case 3: /* 80/132 mode switch unimplemented */
1410 vc->vc_deccolm = on_off;
1411 #if 0
1412 vc_resize(deccolm ? 132 : 80, vc->vc_rows);
1413 /* this alone does not suffice; some user mode
1414 utility has to change the hardware regs */
1415 #endif
1416 break;
1417 case 5: /* Inverted screen on/off */
1418 if (vc->vc_decscnm != on_off) {
1419 vc->vc_decscnm = on_off;
1420 invert_screen(vc, 0, vc->vc_screenbuf_size, 0);
1421 update_attr(vc);
1422 }
1423 break;
1424 case 6: /* Origin relative/absolute */
1425 vc->vc_decom = on_off;
1426 gotoxay(vc, 0, 0);
1427 break;
1428 case 7: /* Autowrap on/off */
1429 vc->vc_decawm = on_off;
1430 break;
1431 case 8: /* Autorepeat on/off */
1432 if (on_off)
1433 set_kbd(vc, decarm);
1434 else
1435 clr_kbd(vc, decarm);
1436 break;
1437 case 9:
1438 vc->vc_report_mouse = on_off ? 1 : 0;
1439 break;
1440 case 25: /* Cursor on/off */
1441 vc->vc_deccm = on_off;
1442 break;
1443 case 1000:
1444 vc->vc_report_mouse = on_off ? 2 : 0;
1445 break;
1446 }
1447 } else {
1448 switch(vc->vc_par[i]) { /* ANSI modes set/reset */
1449 case 3: /* Monitor (display ctrls) */
1450 vc->vc_disp_ctrl = on_off;
1451 break;
1452 case 4: /* Insert Mode on/off */
1453 vc->vc_decim = on_off;
1454 break;
1455 case 20: /* Lf, Enter == CrLf/Lf */
1456 if (on_off)
1457 set_kbd(vc, lnm);
1458 else
1459 clr_kbd(vc, lnm);
1460 break;
1461 }
1462 }
1463 }
1464
1465 /* console_sem is held */
1466 static void setterm_command(struct vc_data *vc)
1467 {
1468 switch(vc->vc_par[0]) {
1469 case 1: /* set color for underline mode */
1470 if (vc->vc_can_do_color &&
1471 vc->vc_par[1] < 16) {
1472 vc->vc_ulcolor = color_table[vc->vc_par[1]];
1473 if (vc->vc_underline)
1474 update_attr(vc);
1475 }
1476 break;
1477 case 2: /* set color for half intensity mode */
1478 if (vc->vc_can_do_color &&
1479 vc->vc_par[1] < 16) {
1480 vc->vc_halfcolor = color_table[vc->vc_par[1]];
1481 if (vc->vc_intensity == 0)
1482 update_attr(vc);
1483 }
1484 break;
1485 case 8: /* store colors as defaults */
1486 vc->vc_def_color = vc->vc_attr;
1487 if (vc->vc_hi_font_mask == 0x100)
1488 vc->vc_def_color >>= 1;
1489 default_attr(vc);
1490 update_attr(vc);
1491 break;
1492 case 9: /* set blanking interval */
1493 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
1494 poke_blanked_console();
1495 break;
1496 case 10: /* set bell frequency in Hz */
1497 if (vc->vc_npar >= 1)
1498 vc->vc_bell_pitch = vc->vc_par[1];
1499 else
1500 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1501 break;
1502 case 11: /* set bell duration in msec */
1503 if (vc->vc_npar >= 1)
1504 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
1505 vc->vc_par[1] * HZ / 1000 : 0;
1506 else
1507 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1508 break;
1509 case 12: /* bring specified console to the front */
1510 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
1511 set_console(vc->vc_par[1] - 1);
1512 break;
1513 case 13: /* unblank the screen */
1514 poke_blanked_console();
1515 break;
1516 case 14: /* set vesa powerdown interval */
1517 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
1518 break;
1519 case 15: /* activate the previous console */
1520 set_console(last_console);
1521 break;
1522 }
1523 }
1524
1525 /* console_sem is held */
1526 static void csi_at(struct vc_data *vc, unsigned int nr)
1527 {
1528 if (nr > vc->vc_cols - vc->vc_x)
1529 nr = vc->vc_cols - vc->vc_x;
1530 else if (!nr)
1531 nr = 1;
1532 insert_char(vc, nr);
1533 }
1534
1535 /* console_sem is held */
1536 static void csi_L(struct vc_data *vc, unsigned int nr)
1537 {
1538 if (nr > vc->vc_rows - vc->vc_y)
1539 nr = vc->vc_rows - vc->vc_y;
1540 else if (!nr)
1541 nr = 1;
1542 scrdown(vc, vc->vc_y, vc->vc_bottom, nr);
1543 vc->vc_need_wrap = 0;
1544 }
1545
1546 /* console_sem is held */
1547 static void csi_P(struct vc_data *vc, unsigned int nr)
1548 {
1549 if (nr > vc->vc_cols - vc->vc_x)
1550 nr = vc->vc_cols - vc->vc_x;
1551 else if (!nr)
1552 nr = 1;
1553 delete_char(vc, nr);
1554 }
1555
1556 /* console_sem is held */
1557 static void csi_M(struct vc_data *vc, unsigned int nr)
1558 {
1559 if (nr > vc->vc_rows - vc->vc_y)
1560 nr = vc->vc_rows - vc->vc_y;
1561 else if (!nr)
1562 nr=1;
1563 scrup(vc, vc->vc_y, vc->vc_bottom, nr);
1564 vc->vc_need_wrap = 0;
1565 }
1566
1567 /* console_sem is held (except via vc_init->reset_terminal */
1568 static void save_cur(struct vc_data *vc)
1569 {
1570 vc->vc_saved_x = vc->vc_x;
1571 vc->vc_saved_y = vc->vc_y;
1572 vc->vc_s_intensity = vc->vc_intensity;
1573 vc->vc_s_italic = vc->vc_italic;
1574 vc->vc_s_underline = vc->vc_underline;
1575 vc->vc_s_blink = vc->vc_blink;
1576 vc->vc_s_reverse = vc->vc_reverse;
1577 vc->vc_s_charset = vc->vc_charset;
1578 vc->vc_s_color = vc->vc_color;
1579 vc->vc_saved_G0 = vc->vc_G0_charset;
1580 vc->vc_saved_G1 = vc->vc_G1_charset;
1581 }
1582
1583 /* console_sem is held */
1584 static void restore_cur(struct vc_data *vc)
1585 {
1586 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
1587 vc->vc_intensity = vc->vc_s_intensity;
1588 vc->vc_italic = vc->vc_s_italic;
1589 vc->vc_underline = vc->vc_s_underline;
1590 vc->vc_blink = vc->vc_s_blink;
1591 vc->vc_reverse = vc->vc_s_reverse;
1592 vc->vc_charset = vc->vc_s_charset;
1593 vc->vc_color = vc->vc_s_color;
1594 vc->vc_G0_charset = vc->vc_saved_G0;
1595 vc->vc_G1_charset = vc->vc_saved_G1;
1596 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc);
1597 update_attr(vc);
1598 vc->vc_need_wrap = 0;
1599 }
1600
1601 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
1602 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
1603 ESpalette };
1604
1605 /* console_sem is held (except via vc_init()) */
1606 static void reset_terminal(struct vc_data *vc, int do_clear)
1607 {
1608 vc->vc_top = 0;
1609 vc->vc_bottom = vc->vc_rows;
1610 vc->vc_state = ESnormal;
1611 vc->vc_ques = 0;
1612 vc->vc_translate = set_translate(LAT1_MAP, vc);
1613 vc->vc_G0_charset = LAT1_MAP;
1614 vc->vc_G1_charset = GRAF_MAP;
1615 vc->vc_charset = 0;
1616 vc->vc_need_wrap = 0;
1617 vc->vc_report_mouse = 0;
1618 vc->vc_utf = default_utf8;
1619 vc->vc_utf_count = 0;
1620
1621 vc->vc_disp_ctrl = 0;
1622 vc->vc_toggle_meta = 0;
1623
1624 vc->vc_decscnm = 0;
1625 vc->vc_decom = 0;
1626 vc->vc_decawm = 1;
1627 vc->vc_deccm = global_cursor_default;
1628 vc->vc_decim = 0;
1629
1630 set_kbd(vc, decarm);
1631 clr_kbd(vc, decckm);
1632 clr_kbd(vc, kbdapplic);
1633 clr_kbd(vc, lnm);
1634 kbd_table[vc->vc_num].lockstate = 0;
1635 kbd_table[vc->vc_num].slockstate = 0;
1636 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS;
1637 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate;
1638 /* do not do set_leds here because this causes an endless tasklet loop
1639 when the keyboard hasn't been initialized yet */
1640
1641 vc->vc_cursor_type = CUR_DEFAULT;
1642 vc->vc_complement_mask = vc->vc_s_complement_mask;
1643
1644 default_attr(vc);
1645 update_attr(vc);
1646
1647 vc->vc_tab_stop[0] = 0x01010100;
1648 vc->vc_tab_stop[1] =
1649 vc->vc_tab_stop[2] =
1650 vc->vc_tab_stop[3] =
1651 vc->vc_tab_stop[4] =
1652 vc->vc_tab_stop[5] =
1653 vc->vc_tab_stop[6] =
1654 vc->vc_tab_stop[7] = 0x01010101;
1655
1656 vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
1657 vc->vc_bell_duration = DEFAULT_BELL_DURATION;
1658
1659 gotoxy(vc, 0, 0);
1660 save_cur(vc);
1661 if (do_clear)
1662 csi_J(vc, 2);
1663 }
1664
1665 /* console_sem is held */
1666 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
1667 {
1668 /*
1669 * Control characters can be used in the _middle_
1670 * of an escape sequence.
1671 */
1672 switch (c) {
1673 case 0:
1674 return;
1675 case 7:
1676 if (vc->vc_bell_duration)
1677 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
1678 return;
1679 case 8:
1680 bs(vc);
1681 return;
1682 case 9:
1683 vc->vc_pos -= (vc->vc_x << 1);
1684 while (vc->vc_x < vc->vc_cols - 1) {
1685 vc->vc_x++;
1686 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31)))
1687 break;
1688 }
1689 vc->vc_pos += (vc->vc_x << 1);
1690 notify_write(vc, '\t');
1691 return;
1692 case 10: case 11: case 12:
1693 lf(vc);
1694 if (!is_kbd(vc, lnm))
1695 return;
1696 case 13:
1697 cr(vc);
1698 return;
1699 case 14:
1700 vc->vc_charset = 1;
1701 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
1702 vc->vc_disp_ctrl = 1;
1703 return;
1704 case 15:
1705 vc->vc_charset = 0;
1706 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
1707 vc->vc_disp_ctrl = 0;
1708 return;
1709 case 24: case 26:
1710 vc->vc_state = ESnormal;
1711 return;
1712 case 27:
1713 vc->vc_state = ESesc;
1714 return;
1715 case 127:
1716 del(vc);
1717 return;
1718 case 128+27:
1719 vc->vc_state = ESsquare;
1720 return;
1721 }
1722 switch(vc->vc_state) {
1723 case ESesc:
1724 vc->vc_state = ESnormal;
1725 switch (c) {
1726 case '[':
1727 vc->vc_state = ESsquare;
1728 return;
1729 case ']':
1730 vc->vc_state = ESnonstd;
1731 return;
1732 case '%':
1733 vc->vc_state = ESpercent;
1734 return;
1735 case 'E':
1736 cr(vc);
1737 lf(vc);
1738 return;
1739 case 'M':
1740 ri(vc);
1741 return;
1742 case 'D':
1743 lf(vc);
1744 return;
1745 case 'H':
1746 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31));
1747 return;
1748 case 'Z':
1749 respond_ID(tty);
1750 return;
1751 case '7':
1752 save_cur(vc);
1753 return;
1754 case '8':
1755 restore_cur(vc);
1756 return;
1757 case '(':
1758 vc->vc_state = ESsetG0;
1759 return;
1760 case ')':
1761 vc->vc_state = ESsetG1;
1762 return;
1763 case '#':
1764 vc->vc_state = EShash;
1765 return;
1766 case 'c':
1767 reset_terminal(vc, 1);
1768 return;
1769 case '>': /* Numeric keypad */
1770 clr_kbd(vc, kbdapplic);
1771 return;
1772 case '=': /* Appl. keypad */
1773 set_kbd(vc, kbdapplic);
1774 return;
1775 }
1776 return;
1777 case ESnonstd:
1778 if (c=='P') { /* palette escape sequence */
1779 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1780 vc->vc_par[vc->vc_npar] = 0;
1781 vc->vc_npar = 0;
1782 vc->vc_state = ESpalette;
1783 return;
1784 } else if (c=='R') { /* reset palette */
1785 reset_palette(vc);
1786 vc->vc_state = ESnormal;
1787 } else
1788 vc->vc_state = ESnormal;
1789 return;
1790 case ESpalette:
1791 if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) {
1792 vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0');
1793 if (vc->vc_npar == 7) {
1794 int i = vc->vc_par[0] * 3, j = 1;
1795 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1796 vc->vc_palette[i++] += vc->vc_par[j++];
1797 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1798 vc->vc_palette[i++] += vc->vc_par[j++];
1799 vc->vc_palette[i] = 16 * vc->vc_par[j++];
1800 vc->vc_palette[i] += vc->vc_par[j];
1801 set_palette(vc);
1802 vc->vc_state = ESnormal;
1803 }
1804 } else
1805 vc->vc_state = ESnormal;
1806 return;
1807 case ESsquare:
1808 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
1809 vc->vc_par[vc->vc_npar] = 0;
1810 vc->vc_npar = 0;
1811 vc->vc_state = ESgetpars;
1812 if (c == '[') { /* Function key */
1813 vc->vc_state=ESfunckey;
1814 return;
1815 }
1816 vc->vc_ques = (c == '?');
1817 if (vc->vc_ques)
1818 return;
1819 case ESgetpars:
1820 if (c == ';' && vc->vc_npar < NPAR - 1) {
1821 vc->vc_npar++;
1822 return;
1823 } else if (c>='0' && c<='9') {
1824 vc->vc_par[vc->vc_npar] *= 10;
1825 vc->vc_par[vc->vc_npar] += c - '0';
1826 return;
1827 } else
1828 vc->vc_state = ESgotpars;
1829 case ESgotpars:
1830 vc->vc_state = ESnormal;
1831 switch(c) {
1832 case 'h':
1833 set_mode(vc, 1);
1834 return;
1835 case 'l':
1836 set_mode(vc, 0);
1837 return;
1838 case 'c':
1839 if (vc->vc_ques) {
1840 if (vc->vc_par[0])
1841 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
1842 else
1843 vc->vc_cursor_type = CUR_DEFAULT;
1844 return;
1845 }
1846 break;
1847 case 'm':
1848 if (vc->vc_ques) {
1849 clear_selection();
1850 if (vc->vc_par[0])
1851 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
1852 else
1853 vc->vc_complement_mask = vc->vc_s_complement_mask;
1854 return;
1855 }
1856 break;
1857 case 'n':
1858 if (!vc->vc_ques) {
1859 if (vc->vc_par[0] == 5)
1860 status_report(tty);
1861 else if (vc->vc_par[0] == 6)
1862 cursor_report(vc, tty);
1863 }
1864 return;
1865 }
1866 if (vc->vc_ques) {
1867 vc->vc_ques = 0;
1868 return;
1869 }
1870 switch(c) {
1871 case 'G': case '`':
1872 if (vc->vc_par[0])
1873 vc->vc_par[0]--;
1874 gotoxy(vc, vc->vc_par[0], vc->vc_y);
1875 return;
1876 case 'A':
1877 if (!vc->vc_par[0])
1878 vc->vc_par[0]++;
1879 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]);
1880 return;
1881 case 'B': case 'e':
1882 if (!vc->vc_par[0])
1883 vc->vc_par[0]++;
1884 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]);
1885 return;
1886 case 'C': case 'a':
1887 if (!vc->vc_par[0])
1888 vc->vc_par[0]++;
1889 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y);
1890 return;
1891 case 'D':
1892 if (!vc->vc_par[0])
1893 vc->vc_par[0]++;
1894 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y);
1895 return;
1896 case 'E':
1897 if (!vc->vc_par[0])
1898 vc->vc_par[0]++;
1899 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]);
1900 return;
1901 case 'F':
1902 if (!vc->vc_par[0])
1903 vc->vc_par[0]++;
1904 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]);
1905 return;
1906 case 'd':
1907 if (vc->vc_par[0])
1908 vc->vc_par[0]--;
1909 gotoxay(vc, vc->vc_x ,vc->vc_par[0]);
1910 return;
1911 case 'H': case 'f':
1912 if (vc->vc_par[0])
1913 vc->vc_par[0]--;
1914 if (vc->vc_par[1])
1915 vc->vc_par[1]--;
1916 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
1917 return;
1918 case 'J':
1919 csi_J(vc, vc->vc_par[0]);
1920 return;
1921 case 'K':
1922 csi_K(vc, vc->vc_par[0]);
1923 return;
1924 case 'L':
1925 csi_L(vc, vc->vc_par[0]);
1926 return;
1927 case 'M':
1928 csi_M(vc, vc->vc_par[0]);
1929 return;
1930 case 'P':
1931 csi_P(vc, vc->vc_par[0]);
1932 return;
1933 case 'c':
1934 if (!vc->vc_par[0])
1935 respond_ID(tty);
1936 return;
1937 case 'g':
1938 if (!vc->vc_par[0])
1939 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31));
1940 else if (vc->vc_par[0] == 3) {
1941 vc->vc_tab_stop[0] =
1942 vc->vc_tab_stop[1] =
1943 vc->vc_tab_stop[2] =
1944 vc->vc_tab_stop[3] =
1945 vc->vc_tab_stop[4] =
1946 vc->vc_tab_stop[5] =
1947 vc->vc_tab_stop[6] =
1948 vc->vc_tab_stop[7] = 0;
1949 }
1950 return;
1951 case 'm':
1952 csi_m(vc);
1953 return;
1954 case 'q': /* DECLL - but only 3 leds */
1955 /* map 0,1,2,3 to 0,1,2,4 */
1956 if (vc->vc_par[0] < 4)
1957 setledstate(kbd_table + vc->vc_num,
1958 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
1959 return;
1960 case 'r':
1961 if (!vc->vc_par[0])
1962 vc->vc_par[0]++;
1963 if (!vc->vc_par[1])
1964 vc->vc_par[1] = vc->vc_rows;
1965 /* Minimum allowed region is 2 lines */
1966 if (vc->vc_par[0] < vc->vc_par[1] &&
1967 vc->vc_par[1] <= vc->vc_rows) {
1968 vc->vc_top = vc->vc_par[0] - 1;
1969 vc->vc_bottom = vc->vc_par[1];
1970 gotoxay(vc, 0, 0);
1971 }
1972 return;
1973 case 's':
1974 save_cur(vc);
1975 return;
1976 case 'u':
1977 restore_cur(vc);
1978 return;
1979 case 'X':
1980 csi_X(vc, vc->vc_par[0]);
1981 return;
1982 case '@':
1983 csi_at(vc, vc->vc_par[0]);
1984 return;
1985 case ']': /* setterm functions */
1986 setterm_command(vc);
1987 return;
1988 }
1989 return;
1990 case ESpercent:
1991 vc->vc_state = ESnormal;
1992 switch (c) {
1993 case '@': /* defined in ISO 2022 */
1994 vc->vc_utf = 0;
1995 return;
1996 case 'G': /* prelim official escape code */
1997 case '8': /* retained for compatibility */
1998 vc->vc_utf = 1;
1999 return;
2000 }
2001 return;
2002 case ESfunckey:
2003 vc->vc_state = ESnormal;
2004 return;
2005 case EShash:
2006 vc->vc_state = ESnormal;
2007 if (c == '8') {
2008 /* DEC screen alignment test. kludge :-) */
2009 vc->vc_video_erase_char =
2010 (vc->vc_video_erase_char & 0xff00) | 'E';
2011 csi_J(vc, 2);
2012 vc->vc_video_erase_char =
2013 (vc->vc_video_erase_char & 0xff00) | ' ';
2014 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
2015 }
2016 return;
2017 case ESsetG0:
2018 if (c == '0')
2019 vc->vc_G0_charset = GRAF_MAP;
2020 else if (c == 'B')
2021 vc->vc_G0_charset = LAT1_MAP;
2022 else if (c == 'U')
2023 vc->vc_G0_charset = IBMPC_MAP;
2024 else if (c == 'K')
2025 vc->vc_G0_charset = USER_MAP;
2026 if (vc->vc_charset == 0)
2027 vc->vc_translate = set_translate(vc->vc_G0_charset, vc);
2028 vc->vc_state = ESnormal;
2029 return;
2030 case ESsetG1:
2031 if (c == '0')
2032 vc->vc_G1_charset = GRAF_MAP;
2033 else if (c == 'B')
2034 vc->vc_G1_charset = LAT1_MAP;
2035 else if (c == 'U')
2036 vc->vc_G1_charset = IBMPC_MAP;
2037 else if (c == 'K')
2038 vc->vc_G1_charset = USER_MAP;
2039 if (vc->vc_charset == 1)
2040 vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
2041 vc->vc_state = ESnormal;
2042 return;
2043 default:
2044 vc->vc_state = ESnormal;
2045 }
2046 }
2047
2048 /* This is a temporary buffer used to prepare a tty console write
2049 * so that we can easily avoid touching user space while holding the
2050 * console spinlock. It is allocated in con_init and is shared by
2051 * this code and the vc_screen read/write tty calls.
2052 *
2053 * We have to allocate this statically in the kernel data section
2054 * since console_init (and thus con_init) are called before any
2055 * kernel memory allocation is available.
2056 */
2057 char con_buf[CON_BUF_SIZE];
2058 DEFINE_MUTEX(con_buf_mtx);
2059
2060 /* is_double_width() is based on the wcwidth() implementation by
2061 * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
2062 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
2063 */
2064 struct interval {
2065 uint32_t first;
2066 uint32_t last;
2067 };
2068
2069 static int bisearch(uint32_t ucs, const struct interval *table, int max)
2070 {
2071 int min = 0;
2072 int mid;
2073
2074 if (ucs < table[0].first || ucs > table[max].last)
2075 return 0;
2076 while (max >= min) {
2077 mid = (min + max) / 2;
2078 if (ucs > table[mid].last)
2079 min = mid + 1;
2080 else if (ucs < table[mid].first)
2081 max = mid - 1;
2082 else
2083 return 1;
2084 }
2085 return 0;
2086 }
2087
2088 static int is_double_width(uint32_t ucs)
2089 {
2090 static const struct interval double_width[] = {
2091 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
2092 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
2093 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
2094 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
2095 };
2096 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
2097 }
2098
2099 /* acquires console_sem */
2100 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2101 {
2102 #ifdef VT_BUF_VRAM_ONLY
2103 #define FLUSH do { } while(0);
2104 #else
2105 #define FLUSH if (draw_x >= 0) { \
2106 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \
2107 draw_x = -1; \
2108 }
2109 #endif
2110
2111 int c, tc, ok, n = 0, draw_x = -1;
2112 unsigned int currcons;
2113 unsigned long draw_from = 0, draw_to = 0;
2114 struct vc_data *vc;
2115 unsigned char vc_attr;
2116 struct vt_notifier_param param;
2117 uint8_t rescan;
2118 uint8_t inverse;
2119 uint8_t width;
2120 u16 himask, charmask;
2121 const unsigned char *orig_buf = NULL;
2122 int orig_count;
2123
2124 if (in_interrupt())
2125 return count;
2126
2127 might_sleep();
2128
2129 acquire_console_sem();
2130 vc = tty->driver_data;
2131 if (vc == NULL) {
2132 printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
2133 release_console_sem();
2134 return 0;
2135 }
2136
2137 currcons = vc->vc_num;
2138 if (!vc_cons_allocated(currcons)) {
2139 /* could this happen? */
2140 printk_once("con_write: tty %d not allocated\n", currcons+1);
2141 release_console_sem();
2142 return 0;
2143 }
2144 orig_buf = buf;
2145 orig_count = count;
2146
2147 himask = vc->vc_hi_font_mask;
2148 charmask = himask ? 0x1ff : 0xff;
2149
2150 /* undraw cursor first */
2151 if (IS_FG(vc))
2152 hide_cursor(vc);
2153
2154 param.vc = vc;
2155
2156 while (!tty->stopped && count) {
2157 int orig = *buf;
2158 c = orig;
2159 buf++;
2160 n++;
2161 count--;
2162 rescan = 0;
2163 inverse = 0;
2164 width = 1;
2165
2166 /* Do no translation at all in control states */
2167 if (vc->vc_state != ESnormal) {
2168 tc = c;
2169 } else if (vc->vc_utf && !vc->vc_disp_ctrl) {
2170 /* Combine UTF-8 into Unicode in vc_utf_char.
2171 * vc_utf_count is the number of continuation bytes still
2172 * expected to arrive.
2173 * vc_npar is the number of continuation bytes arrived so
2174 * far
2175 */
2176 rescan_last_byte:
2177 if ((c & 0xc0) == 0x80) {
2178 /* Continuation byte received */
2179 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff };
2180 if (vc->vc_utf_count) {
2181 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
2182 vc->vc_npar++;
2183 if (--vc->vc_utf_count) {
2184 /* Still need some bytes */
2185 continue;
2186 }
2187 /* Got a whole character */
2188 c = vc->vc_utf_char;
2189 /* Reject overlong sequences */
2190 if (c <= utf8_length_changes[vc->vc_npar - 1] ||
2191 c > utf8_length_changes[vc->vc_npar])
2192 c = 0xfffd;
2193 } else {
2194 /* Unexpected continuation byte */
2195 vc->vc_utf_count = 0;
2196 c = 0xfffd;
2197 }
2198 } else {
2199 /* Single ASCII byte or first byte of a sequence received */
2200 if (vc->vc_utf_count) {
2201 /* Continuation byte expected */
2202 rescan = 1;
2203 vc->vc_utf_count = 0;
2204 c = 0xfffd;
2205 } else if (c > 0x7f) {
2206 /* First byte of a multibyte sequence received */
2207 vc->vc_npar = 0;
2208 if ((c & 0xe0) == 0xc0) {
2209 vc->vc_utf_count = 1;
2210 vc->vc_utf_char = (c & 0x1f);
2211 } else if ((c & 0xf0) == 0xe0) {
2212 vc->vc_utf_count = 2;
2213 vc->vc_utf_char = (c & 0x0f);
2214 } else if ((c & 0xf8) == 0xf0) {
2215 vc->vc_utf_count = 3;
2216 vc->vc_utf_char = (c & 0x07);
2217 } else if ((c & 0xfc) == 0xf8) {
2218 vc->vc_utf_count = 4;
2219 vc->vc_utf_char = (c & 0x03);
2220 } else if ((c & 0xfe) == 0xfc) {
2221 vc->vc_utf_count = 5;
2222 vc->vc_utf_char = (c & 0x01);
2223 } else {
2224 /* 254 and 255 are invalid */
2225 c = 0xfffd;
2226 }
2227 if (vc->vc_utf_count) {
2228 /* Still need some bytes */
2229 continue;
2230 }
2231 }
2232 /* Nothing to do if an ASCII byte was received */
2233 }
2234 /* End of UTF-8 decoding. */
2235 /* c is the received character, or U+FFFD for invalid sequences. */
2236 /* Replace invalid Unicode code points with U+FFFD too */
2237 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
2238 c = 0xfffd;
2239 tc = c;
2240 } else { /* no utf or alternate charset mode */
2241 tc = vc_translate(vc, c);
2242 }
2243
2244 param.c = tc;
2245 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
2246 &param) == NOTIFY_STOP)
2247 continue;
2248
2249 /* If the original code was a control character we
2250 * only allow a glyph to be displayed if the code is
2251 * not normally used (such as for cursor movement) or
2252 * if the disp_ctrl mode has been explicitly enabled.
2253 * Certain characters (as given by the CTRL_ALWAYS
2254 * bitmap) are always displayed as control characters,
2255 * as the console would be pretty useless without
2256 * them; to display an arbitrary font position use the
2257 * direct-to-font zone in UTF-8 mode.
2258 */
2259 ok = tc && (c >= 32 ||
2260 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 :
2261 vc->vc_utf || ((CTRL_ACTION >> c) & 1)))
2262 && (c != 127 || vc->vc_disp_ctrl)
2263 && (c != 128+27);
2264
2265 if (vc->vc_state == ESnormal && ok) {
2266 if (vc->vc_utf && !vc->vc_disp_ctrl) {
2267 if (is_double_width(c))
2268 width = 2;
2269 }
2270 /* Now try to find out how to display it */
2271 tc = conv_uni_to_pc(vc, tc);
2272 if (tc & ~charmask) {
2273 if (tc == -1 || tc == -2) {
2274 continue; /* nothing to display */
2275 }
2276 /* Glyph not found */
2277 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) {
2278 /* In legacy mode use the glyph we get by a 1:1 mapping.
2279 This would make absolutely no sense with Unicode in mind,
2280 but do this for ASCII characters since a font may lack
2281 Unicode mapping info and we don't want to end up with
2282 having question marks only. */
2283 tc = c;
2284 } else {
2285 /* Display U+FFFD. If it's not found, display an inverse question mark. */
2286 tc = conv_uni_to_pc(vc, 0xfffd);
2287 if (tc < 0) {
2288 inverse = 1;
2289 tc = conv_uni_to_pc(vc, '?');
2290 if (tc < 0) tc = '?';
2291 }
2292 }
2293 }
2294
2295 if (!inverse) {
2296 vc_attr = vc->vc_attr;
2297 } else {
2298 /* invert vc_attr */
2299 if (!vc->vc_can_do_color) {
2300 vc_attr = (vc->vc_attr) ^ 0x08;
2301 } else if (vc->vc_hi_font_mask == 0x100) {
2302 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4);
2303 } else {
2304 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4);
2305 }
2306 FLUSH
2307 }
2308
2309 while (1) {
2310 if (vc->vc_need_wrap || vc->vc_decim)
2311 FLUSH
2312 if (vc->vc_need_wrap) {
2313 cr(vc);
2314 lf(vc);
2315 }
2316 if (vc->vc_decim)
2317 insert_char(vc, 1);
2318 scr_writew(himask ?
2319 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) :
2320 (vc_attr << 8) + tc,
2321 (u16 *) vc->vc_pos);
2322 if (DO_UPDATE(vc) && draw_x < 0) {
2323 draw_x = vc->vc_x;
2324 draw_from = vc->vc_pos;
2325 }
2326 if (vc->vc_x == vc->vc_cols - 1) {
2327 vc->vc_need_wrap = vc->vc_decawm;
2328 draw_to = vc->vc_pos + 2;
2329 } else {
2330 vc->vc_x++;
2331 draw_to = (vc->vc_pos += 2);
2332 }
2333
2334 if (!--width) break;
2335
2336 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */
2337 if (tc < 0) tc = ' ';
2338 }
2339 notify_write(vc, c);
2340
2341 if (inverse) {
2342 FLUSH
2343 }
2344
2345 if (rescan) {
2346 rescan = 0;
2347 inverse = 0;
2348 width = 1;
2349 c = orig;
2350 goto rescan_last_byte;
2351 }
2352 continue;
2353 }
2354 FLUSH
2355 do_con_trol(tty, vc, orig);
2356 }
2357 FLUSH
2358 console_conditional_schedule();
2359 release_console_sem();
2360 notify_update(vc);
2361 return n;
2362 #undef FLUSH
2363 }
2364
2365 /*
2366 * This is the console switching callback.
2367 *
2368 * Doing console switching in a process context allows
2369 * us to do the switches asynchronously (needed when we want
2370 * to switch due to a keyboard interrupt). Synchronization
2371 * with other console code and prevention of re-entrancy is
2372 * ensured with console_sem.
2373 */
2374 static void console_callback(struct work_struct *ignored)
2375 {
2376 acquire_console_sem();
2377
2378 if (want_console >= 0) {
2379 if (want_console != fg_console &&
2380 vc_cons_allocated(want_console)) {
2381 hide_cursor(vc_cons[fg_console].d);
2382 change_console(vc_cons[want_console].d);
2383 /* we only changed when the console had already
2384 been allocated - a new console is not created
2385 in an interrupt routine */
2386 }
2387 want_console = -1;
2388 }
2389 if (do_poke_blanked_console) { /* do not unblank for a LED change */
2390 do_poke_blanked_console = 0;
2391 poke_blanked_console();
2392 }
2393 if (scrollback_delta) {
2394 struct vc_data *vc = vc_cons[fg_console].d;
2395 clear_selection();
2396 if (vc->vc_mode == KD_TEXT)
2397 vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
2398 scrollback_delta = 0;
2399 }
2400 if (blank_timer_expired) {
2401 do_blank_screen(0);
2402 blank_timer_expired = 0;
2403 }
2404 notify_update(vc_cons[fg_console].d);
2405
2406 release_console_sem();
2407 }
2408
2409 int set_console(int nr)
2410 {
2411 struct vc_data *vc = vc_cons[fg_console].d;
2412
2413 if (!vc_cons_allocated(nr) || vt_dont_switch ||
2414 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
2415
2416 /*
2417 * Console switch will fail in console_callback() or
2418 * change_console() so there is no point scheduling
2419 * the callback
2420 *
2421 * Existing set_console() users don't check the return
2422 * value so this shouldn't break anything
2423 */
2424 return -EINVAL;
2425 }
2426
2427 want_console = nr;
2428 schedule_console_callback();
2429
2430 return 0;
2431 }
2432
2433 struct tty_driver *console_driver;
2434
2435 #ifdef CONFIG_VT_CONSOLE
2436
2437 /*
2438 * Console on virtual terminal
2439 *
2440 * The console must be locked when we get here.
2441 */
2442
2443 static void vt_console_print(struct console *co, const char *b, unsigned count)
2444 {
2445 struct vc_data *vc = vc_cons[fg_console].d;
2446 unsigned char c;
2447 static DEFINE_SPINLOCK(printing_lock);
2448 const ushort *start;
2449 ushort cnt = 0;
2450 ushort myx;
2451
2452 /* console busy or not yet initialized */
2453 if (!printable)
2454 return;
2455 if (!spin_trylock(&printing_lock))
2456 return;
2457
2458 if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
2459 vc = vc_cons[kmsg_redirect - 1].d;
2460
2461 /* read `x' only after setting currcons properly (otherwise
2462 the `x' macro will read the x of the foreground console). */
2463 myx = vc->vc_x;
2464
2465 if (!vc_cons_allocated(fg_console)) {
2466 /* impossible */
2467 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
2468 goto quit;
2469 }
2470
2471 if (vc->vc_mode != KD_TEXT)
2472 goto quit;
2473
2474 /* undraw cursor first */
2475 if (IS_FG(vc))
2476 hide_cursor(vc);
2477
2478 start = (ushort *)vc->vc_pos;
2479
2480 /* Contrived structure to try to emulate original need_wrap behaviour
2481 * Problems caused when we have need_wrap set on '\n' character */
2482 while (count--) {
2483 c = *b++;
2484 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
2485 if (cnt > 0) {
2486 if (CON_IS_VISIBLE(vc))
2487 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2488 vc->vc_x += cnt;
2489 if (vc->vc_need_wrap)
2490 vc->vc_x--;
2491 cnt = 0;
2492 }
2493 if (c == 8) { /* backspace */
2494 bs(vc);
2495 start = (ushort *)vc->vc_pos;
2496 myx = vc->vc_x;
2497 continue;
2498 }
2499 if (c != 13)
2500 lf(vc);
2501 cr(vc);
2502 start = (ushort *)vc->vc_pos;
2503 myx = vc->vc_x;
2504 if (c == 10 || c == 13)
2505 continue;
2506 }
2507 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
2508 notify_write(vc, c);
2509 cnt++;
2510 if (myx == vc->vc_cols - 1) {
2511 vc->vc_need_wrap = 1;
2512 continue;
2513 }
2514 vc->vc_pos += 2;
2515 myx++;
2516 }
2517 if (cnt > 0) {
2518 if (CON_IS_VISIBLE(vc))
2519 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x);
2520 vc->vc_x += cnt;
2521 if (vc->vc_x == vc->vc_cols) {
2522 vc->vc_x--;
2523 vc->vc_need_wrap = 1;
2524 }
2525 }
2526 set_cursor(vc);
2527 notify_update(vc);
2528
2529 quit:
2530 spin_unlock(&printing_lock);
2531 }
2532
2533 static struct tty_driver *vt_console_device(struct console *c, int *index)
2534 {
2535 *index = c->index ? c->index-1 : fg_console;
2536 return console_driver;
2537 }
2538
2539 static struct console vt_console_driver = {
2540 .name = "tty",
2541 .write = vt_console_print,
2542 .device = vt_console_device,
2543 .unblank = unblank_screen,
2544 .flags = CON_PRINTBUFFER,
2545 .index = -1,
2546 };
2547 #endif
2548
2549 /*
2550 * Handling of Linux-specific VC ioctls
2551 */
2552
2553 /*
2554 * Generally a bit racy with respect to console_sem().
2555 *
2556 * There are some functions which don't need it.
2557 *
2558 * There are some functions which can sleep for arbitrary periods
2559 * (paste_selection) but we don't need the lock there anyway.
2560 *
2561 * set_selection has locking, and definitely needs it
2562 */
2563
2564 int tioclinux(struct tty_struct *tty, unsigned long arg)
2565 {
2566 char type, data;
2567 char __user *p = (char __user *)arg;
2568 int lines;
2569 int ret;
2570
2571 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
2572 return -EPERM;
2573 if (get_user(type, p))
2574 return -EFAULT;
2575 ret = 0;
2576
2577 lock_kernel();
2578
2579 switch (type)
2580 {
2581 case TIOCL_SETSEL:
2582 acquire_console_sem();
2583 ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
2584 release_console_sem();
2585 break;
2586 case TIOCL_PASTESEL:
2587 ret = paste_selection(tty);
2588 break;
2589 case TIOCL_UNBLANKSCREEN:
2590 acquire_console_sem();
2591 unblank_screen();
2592 release_console_sem();
2593 break;
2594 case TIOCL_SELLOADLUT:
2595 ret = sel_loadlut(p);
2596 break;
2597 case TIOCL_GETSHIFTSTATE:
2598
2599 /*
2600 * Make it possible to react to Shift+Mousebutton.
2601 * Note that 'shift_state' is an undocumented
2602 * kernel-internal variable; programs not closely
2603 * related to the kernel should not use this.
2604 */
2605 data = shift_state;
2606 ret = __put_user(data, p);
2607 break;
2608 case TIOCL_GETMOUSEREPORTING:
2609 data = mouse_reporting();
2610 ret = __put_user(data, p);
2611 break;
2612 case TIOCL_SETVESABLANK:
2613 ret = set_vesa_blanking(p);
2614 break;
2615 case TIOCL_GETKMSGREDIRECT:
2616 data = kmsg_redirect;
2617 ret = __put_user(data, p);
2618 break;
2619 case TIOCL_SETKMSGREDIRECT:
2620 if (!capable(CAP_SYS_ADMIN)) {
2621 ret = -EPERM;
2622 } else {
2623 if (get_user(data, p+1))
2624 ret = -EFAULT;
2625 else
2626 kmsg_redirect = data;
2627 }
2628 break;
2629 case TIOCL_GETFGCONSOLE:
2630 ret = fg_console;
2631 break;
2632 case TIOCL_SCROLLCONSOLE:
2633 if (get_user(lines, (s32 __user *)(p+4))) {
2634 ret = -EFAULT;
2635 } else {
2636 scrollfront(vc_cons[fg_console].d, lines);
2637 ret = 0;
2638 }
2639 break;
2640 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
2641 acquire_console_sem();
2642 ignore_poke = 1;
2643 do_blank_screen(0);
2644 release_console_sem();
2645 break;
2646 case TIOCL_BLANKEDSCREEN:
2647 ret = console_blanked;
2648 break;
2649 default:
2650 ret = -EINVAL;
2651 break;
2652 }
2653 unlock_kernel();
2654 return ret;
2655 }
2656
2657 /*
2658 * /dev/ttyN handling
2659 */
2660
2661 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
2662 {
2663 int retval;
2664
2665 retval = do_con_write(tty, buf, count);
2666 con_flush_chars(tty);
2667
2668 return retval;
2669 }
2670
2671 static int con_put_char(struct tty_struct *tty, unsigned char ch)
2672 {
2673 if (in_interrupt())
2674 return 0; /* n_r3964 calls put_char() from interrupt context */
2675 return do_con_write(tty, &ch, 1);
2676 }
2677
2678 static int con_write_room(struct tty_struct *tty)
2679 {
2680 if (tty->stopped)
2681 return 0;
2682 return 32768; /* No limit, really; we're not buffering */
2683 }
2684
2685 static int con_chars_in_buffer(struct tty_struct *tty)
2686 {
2687 return 0; /* we're not buffering */
2688 }
2689
2690 /*
2691 * con_throttle and con_unthrottle are only used for
2692 * paste_selection(), which has to stuff in a large number of
2693 * characters...
2694 */
2695 static void con_throttle(struct tty_struct *tty)
2696 {
2697 }
2698
2699 static void con_unthrottle(struct tty_struct *tty)
2700 {
2701 struct vc_data *vc = tty->driver_data;
2702
2703 wake_up_interruptible(&vc->paste_wait);
2704 }
2705
2706 /*
2707 * Turn the Scroll-Lock LED on when the tty is stopped
2708 */
2709 static void con_stop(struct tty_struct *tty)
2710 {
2711 int console_num;
2712 if (!tty)
2713 return;
2714 console_num = tty->index;
2715 if (!vc_cons_allocated(console_num))
2716 return;
2717 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2718 set_leds();
2719 }
2720
2721 /*
2722 * Turn the Scroll-Lock LED off when the console is started
2723 */
2724 static void con_start(struct tty_struct *tty)
2725 {
2726 int console_num;
2727 if (!tty)
2728 return;
2729 console_num = tty->index;
2730 if (!vc_cons_allocated(console_num))
2731 return;
2732 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK);
2733 set_leds();
2734 }
2735
2736 static void con_flush_chars(struct tty_struct *tty)
2737 {
2738 struct vc_data *vc;
2739
2740 if (in_interrupt()) /* from flush_to_ldisc */
2741 return;
2742
2743 /* if we race with con_close(), vt may be null */
2744 acquire_console_sem();
2745 vc = tty->driver_data;
2746 if (vc)
2747 set_cursor(vc);
2748 release_console_sem();
2749 }
2750
2751 /*
2752 * Allocate the console screen memory.
2753 */
2754 static int con_open(struct tty_struct *tty, struct file *filp)
2755 {
2756 unsigned int currcons = tty->index;
2757 int ret = 0;
2758
2759 acquire_console_sem();
2760 if (tty->driver_data == NULL) {
2761 ret = vc_allocate(currcons);
2762 if (ret == 0) {
2763 struct vc_data *vc = vc_cons[currcons].d;
2764
2765 /* Still being freed */
2766 if (vc->vc_tty) {
2767 release_console_sem();
2768 return -ERESTARTSYS;
2769 }
2770 tty->driver_data = vc;
2771 vc->vc_tty = tty;
2772
2773 if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
2774 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
2775 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
2776 }
2777 if (vc->vc_utf)
2778 tty->termios->c_iflag |= IUTF8;
2779 else
2780 tty->termios->c_iflag &= ~IUTF8;
2781 release_console_sem();
2782 return ret;
2783 }
2784 }
2785 release_console_sem();
2786 return ret;
2787 }
2788
2789 static void con_close(struct tty_struct *tty, struct file *filp)
2790 {
2791 /* Nothing to do - we defer to shutdown */
2792 }
2793
2794 static void con_shutdown(struct tty_struct *tty)
2795 {
2796 struct vc_data *vc = tty->driver_data;
2797 BUG_ON(vc == NULL);
2798 acquire_console_sem();
2799 vc->vc_tty = NULL;
2800 release_console_sem();
2801 tty_shutdown(tty);
2802 }
2803
2804 static int default_italic_color = 2; // green (ASCII)
2805 static int default_underline_color = 3; // cyan (ASCII)
2806 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
2807 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
2808
2809 static void vc_init(struct vc_data *vc, unsigned int rows,
2810 unsigned int cols, int do_clear)
2811 {
2812 int j, k ;
2813
2814 vc->vc_cols = cols;
2815 vc->vc_rows = rows;
2816 vc->vc_size_row = cols << 1;
2817 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
2818
2819 set_origin(vc);
2820 vc->vc_pos = vc->vc_origin;
2821 reset_vc(vc);
2822 for (j=k=0; j<16; j++) {
2823 vc->vc_palette[k++] = default_red[j] ;
2824 vc->vc_palette[k++] = default_grn[j] ;
2825 vc->vc_palette[k++] = default_blu[j] ;
2826 }
2827 vc->vc_def_color = 0x07; /* white */
2828 vc->vc_ulcolor = default_underline_color;
2829 vc->vc_itcolor = default_italic_color;
2830 vc->vc_halfcolor = 0x08; /* grey */
2831 init_waitqueue_head(&vc->paste_wait);
2832 reset_terminal(vc, do_clear);
2833 }
2834
2835 /*
2836 * This routine initializes console interrupts, and does nothing
2837 * else. If you want the screen to clear, call tty_write with
2838 * the appropriate escape-sequence.
2839 */
2840
2841 static int __init con_init(void)
2842 {
2843 const char *display_desc = NULL;
2844 struct vc_data *vc;
2845 unsigned int currcons = 0, i;
2846
2847 acquire_console_sem();
2848
2849 if (conswitchp)
2850 display_desc = conswitchp->con_startup();
2851 if (!display_desc) {
2852 fg_console = 0;
2853 release_console_sem();
2854 return 0;
2855 }
2856
2857 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2858 struct con_driver *con_driver = &registered_con_driver[i];
2859
2860 if (con_driver->con == NULL) {
2861 con_driver->con = conswitchp;
2862 con_driver->desc = display_desc;
2863 con_driver->flag = CON_DRIVER_FLAG_INIT;
2864 con_driver->first = 0;
2865 con_driver->last = MAX_NR_CONSOLES - 1;
2866 break;
2867 }
2868 }
2869
2870 for (i = 0; i < MAX_NR_CONSOLES; i++)
2871 con_driver_map[i] = conswitchp;
2872
2873 if (blankinterval) {
2874 blank_state = blank_normal_wait;
2875 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
2876 }
2877
2878 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
2879 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
2880 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
2881 visual_init(vc, currcons, 1);
2882 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
2883 vc_init(vc, vc->vc_rows, vc->vc_cols,
2884 currcons || !vc->vc_sw->con_save_screen);
2885 }
2886 currcons = fg_console = 0;
2887 master_display_fg = vc = vc_cons[currcons].d;
2888 set_origin(vc);
2889 save_screen(vc);
2890 gotoxy(vc, vc->vc_x, vc->vc_y);
2891 csi_J(vc, 0);
2892 update_screen(vc);
2893 printk("Console: %s %s %dx%d",
2894 vc->vc_can_do_color ? "colour" : "mono",
2895 display_desc, vc->vc_cols, vc->vc_rows);
2896 printable = 1;
2897 printk("\n");
2898
2899 release_console_sem();
2900
2901 #ifdef CONFIG_VT_CONSOLE
2902 register_console(&vt_console_driver);
2903 #endif
2904 return 0;
2905 }
2906 console_initcall(con_init);
2907
2908 static const struct tty_operations con_ops = {
2909 .open = con_open,
2910 .close = con_close,
2911 .write = con_write,
2912 .write_room = con_write_room,
2913 .put_char = con_put_char,
2914 .flush_chars = con_flush_chars,
2915 .chars_in_buffer = con_chars_in_buffer,
2916 .ioctl = vt_ioctl,
2917 #ifdef CONFIG_COMPAT
2918 .compat_ioctl = vt_compat_ioctl,
2919 #endif
2920 .stop = con_stop,
2921 .start = con_start,
2922 .throttle = con_throttle,
2923 .unthrottle = con_unthrottle,
2924 .resize = vt_resize,
2925 .shutdown = con_shutdown
2926 };
2927
2928 static struct cdev vc0_cdev;
2929
2930 int __init vty_init(const struct file_operations *console_fops)
2931 {
2932 cdev_init(&vc0_cdev, console_fops);
2933 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
2934 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
2935 panic("Couldn't register /dev/tty0 driver\n");
2936 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
2937
2938 vcs_init();
2939
2940 console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
2941 if (!console_driver)
2942 panic("Couldn't allocate console driver\n");
2943 console_driver->owner = THIS_MODULE;
2944 console_driver->name = "tty";
2945 console_driver->name_base = 1;
2946 console_driver->major = TTY_MAJOR;
2947 console_driver->minor_start = 1;
2948 console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
2949 console_driver->init_termios = tty_std_termios;
2950 if (default_utf8)
2951 console_driver->init_termios.c_iflag |= IUTF8;
2952 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
2953 tty_set_operations(console_driver, &con_ops);
2954 if (tty_register_driver(console_driver))
2955 panic("Couldn't register console driver\n");
2956 kbd_init();
2957 console_map_init();
2958 #ifdef CONFIG_MDA_CONSOLE
2959 mda_console_init();
2960 #endif
2961 return 0;
2962 }
2963
2964 #ifndef VT_SINGLE_DRIVER
2965
2966 static struct class *vtconsole_class;
2967
2968 static int bind_con_driver(const struct consw *csw, int first, int last,
2969 int deflt)
2970 {
2971 struct module *owner = csw->owner;
2972 const char *desc = NULL;
2973 struct con_driver *con_driver;
2974 int i, j = -1, k = -1, retval = -ENODEV;
2975
2976 if (!try_module_get(owner))
2977 return -ENODEV;
2978
2979 acquire_console_sem();
2980
2981 /* check if driver is registered */
2982 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
2983 con_driver = &registered_con_driver[i];
2984
2985 if (con_driver->con == csw) {
2986 desc = con_driver->desc;
2987 retval = 0;
2988 break;
2989 }
2990 }
2991
2992 if (retval)
2993 goto err;
2994
2995 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
2996 csw->con_startup();
2997 con_driver->flag |= CON_DRIVER_FLAG_INIT;
2998 }
2999
3000 if (deflt) {
3001 if (conswitchp)
3002 module_put(conswitchp->owner);
3003
3004 __module_get(owner);
3005 conswitchp = csw;
3006 }
3007
3008 first = max(first, con_driver->first);
3009 last = min(last, con_driver->last);
3010
3011 for (i = first; i <= last; i++) {
3012 int old_was_color;
3013 struct vc_data *vc = vc_cons[i].d;
3014
3015 if (con_driver_map[i])
3016 module_put(con_driver_map[i]->owner);
3017 __module_get(owner);
3018 con_driver_map[i] = csw;
3019
3020 if (!vc || !vc->vc_sw)
3021 continue;
3022
3023 j = i;
3024
3025 if (CON_IS_VISIBLE(vc)) {
3026 k = i;
3027 save_screen(vc);
3028 }
3029
3030 old_was_color = vc->vc_can_do_color;
3031 vc->vc_sw->con_deinit(vc);
3032 vc->vc_origin = (unsigned long)vc->vc_screenbuf;
3033 visual_init(vc, i, 0);
3034 set_origin(vc);
3035 update_attr(vc);
3036
3037 /* If the console changed between mono <-> color, then
3038 * the attributes in the screenbuf will be wrong. The
3039 * following resets all attributes to something sane.
3040 */
3041 if (old_was_color != vc->vc_can_do_color)
3042 clear_buffer_attributes(vc);
3043 }
3044
3045 printk("Console: switching ");
3046 if (!deflt)
3047 printk("consoles %d-%d ", first+1, last+1);
3048 if (j >= 0) {
3049 struct vc_data *vc = vc_cons[j].d;
3050
3051 printk("to %s %s %dx%d\n",
3052 vc->vc_can_do_color ? "colour" : "mono",
3053 desc, vc->vc_cols, vc->vc_rows);
3054
3055 if (k >= 0) {
3056 vc = vc_cons[k].d;
3057 update_screen(vc);
3058 }
3059 } else
3060 printk("to %s\n", desc);
3061
3062 retval = 0;
3063 err:
3064 release_console_sem();
3065 module_put(owner);
3066 return retval;
3067 };
3068
3069 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3070 static int con_is_graphics(const struct consw *csw, int first, int last)
3071 {
3072 int i, retval = 0;
3073
3074 for (i = first; i <= last; i++) {
3075 struct vc_data *vc = vc_cons[i].d;
3076
3077 if (vc && vc->vc_mode == KD_GRAPHICS) {
3078 retval = 1;
3079 break;
3080 }
3081 }
3082
3083 return retval;
3084 }
3085
3086 /**
3087 * unbind_con_driver - unbind a console driver
3088 * @csw: pointer to console driver to unregister
3089 * @first: first in range of consoles that @csw should be unbound from
3090 * @last: last in range of consoles that @csw should be unbound from
3091 * @deflt: should next bound console driver be default after @csw is unbound?
3092 *
3093 * To unbind a driver from all possible consoles, pass 0 as @first and
3094 * %MAX_NR_CONSOLES as @last.
3095 *
3096 * @deflt controls whether the console that ends up replacing @csw should be
3097 * the default console.
3098 *
3099 * RETURNS:
3100 * -ENODEV if @csw isn't a registered console driver or can't be unregistered
3101 * or 0 on success.
3102 */
3103 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
3104 {
3105 struct module *owner = csw->owner;
3106 const struct consw *defcsw = NULL;
3107 struct con_driver *con_driver = NULL, *con_back = NULL;
3108 int i, retval = -ENODEV;
3109
3110 if (!try_module_get(owner))
3111 return -ENODEV;
3112
3113 acquire_console_sem();
3114
3115 /* check if driver is registered and if it is unbindable */
3116 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3117 con_driver = &registered_con_driver[i];
3118
3119 if (con_driver->con == csw &&
3120 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3121 retval = 0;
3122 break;
3123 }
3124 }
3125
3126 if (retval) {
3127 release_console_sem();
3128 goto err;
3129 }
3130
3131 retval = -ENODEV;
3132
3133 /* check if backup driver exists */
3134 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3135 con_back = &registered_con_driver[i];
3136
3137 if (con_back->con &&
3138 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
3139 defcsw = con_back->con;
3140 retval = 0;
3141 break;
3142 }
3143 }
3144
3145 if (retval) {
3146 release_console_sem();
3147 goto err;
3148 }
3149
3150 if (!con_is_bound(csw)) {
3151 release_console_sem();
3152 goto err;
3153 }
3154
3155 first = max(first, con_driver->first);
3156 last = min(last, con_driver->last);
3157
3158 for (i = first; i <= last; i++) {
3159 if (con_driver_map[i] == csw) {
3160 module_put(csw->owner);
3161 con_driver_map[i] = NULL;
3162 }
3163 }
3164
3165 if (!con_is_bound(defcsw)) {
3166 const struct consw *defconsw = conswitchp;
3167
3168 defcsw->con_startup();
3169 con_back->flag |= CON_DRIVER_FLAG_INIT;
3170 /*
3171 * vgacon may change the default driver to point
3172 * to dummycon, we restore it here...
3173 */
3174 conswitchp = defconsw;
3175 }
3176
3177 if (!con_is_bound(csw))
3178 con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
3179
3180 release_console_sem();
3181 /* ignore return value, binding should not fail */
3182 bind_con_driver(defcsw, first, last, deflt);
3183 err:
3184 module_put(owner);
3185 return retval;
3186
3187 }
3188 EXPORT_SYMBOL(unbind_con_driver);
3189
3190 static int vt_bind(struct con_driver *con)
3191 {
3192 const struct consw *defcsw = NULL, *csw = NULL;
3193 int i, more = 1, first = -1, last = -1, deflt = 0;
3194
3195 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3196 con_is_graphics(con->con, con->first, con->last))
3197 goto err;
3198
3199 csw = con->con;
3200
3201 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3202 struct con_driver *con = &registered_con_driver[i];
3203
3204 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
3205 defcsw = con->con;
3206 break;
3207 }
3208 }
3209
3210 if (!defcsw)
3211 goto err;
3212
3213 while (more) {
3214 more = 0;
3215
3216 for (i = con->first; i <= con->last; i++) {
3217 if (con_driver_map[i] == defcsw) {
3218 if (first == -1)
3219 first = i;
3220 last = i;
3221 more = 1;
3222 } else if (first != -1)
3223 break;
3224 }
3225
3226 if (first == 0 && last == MAX_NR_CONSOLES -1)
3227 deflt = 1;
3228
3229 if (first != -1)
3230 bind_con_driver(csw, first, last, deflt);
3231
3232 first = -1;
3233 last = -1;
3234 deflt = 0;
3235 }
3236
3237 err:
3238 return 0;
3239 }
3240
3241 static int vt_unbind(struct con_driver *con)
3242 {
3243 const struct consw *csw = NULL;
3244 int i, more = 1, first = -1, last = -1, deflt = 0;
3245
3246 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
3247 con_is_graphics(con->con, con->first, con->last))
3248 goto err;
3249
3250 csw = con->con;
3251
3252 while (more) {
3253 more = 0;
3254
3255 for (i = con->first; i <= con->last; i++) {
3256 if (con_driver_map[i] == csw) {
3257 if (first == -1)
3258 first = i;
3259 last = i;
3260 more = 1;
3261 } else if (first != -1)
3262 break;
3263 }
3264
3265 if (first == 0 && last == MAX_NR_CONSOLES -1)
3266 deflt = 1;
3267
3268 if (first != -1)
3269 unbind_con_driver(csw, first, last, deflt);
3270
3271 first = -1;
3272 last = -1;
3273 deflt = 0;
3274 }
3275
3276 err:
3277 return 0;
3278 }
3279 #else
3280 static inline int vt_bind(struct con_driver *con)
3281 {
3282 return 0;
3283 }
3284 static inline int vt_unbind(struct con_driver *con)
3285 {
3286 return 0;
3287 }
3288 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3289
3290 static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
3291 const char *buf, size_t count)
3292 {
3293 struct con_driver *con = dev_get_drvdata(dev);
3294 int bind = simple_strtoul(buf, NULL, 0);
3295
3296 if (bind)
3297 vt_bind(con);
3298 else
3299 vt_unbind(con);
3300
3301 return count;
3302 }
3303
3304 static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
3305 char *buf)
3306 {
3307 struct con_driver *con = dev_get_drvdata(dev);
3308 int bind = con_is_bound(con->con);
3309
3310 return snprintf(buf, PAGE_SIZE, "%i\n", bind);
3311 }
3312
3313 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
3314 char *buf)
3315 {
3316 struct con_driver *con = dev_get_drvdata(dev);
3317
3318 return snprintf(buf, PAGE_SIZE, "%s %s\n",
3319 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
3320 con->desc);
3321
3322 }
3323
3324 static struct device_attribute device_attrs[] = {
3325 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind),
3326 __ATTR(name, S_IRUGO, show_name, NULL),
3327 };
3328
3329 static int vtconsole_init_device(struct con_driver *con)
3330 {
3331 int i;
3332 int error = 0;
3333
3334 con->flag |= CON_DRIVER_FLAG_ATTR;
3335 dev_set_drvdata(con->dev, con);
3336 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3337 error = device_create_file(con->dev, &device_attrs[i]);
3338 if (error)
3339 break;
3340 }
3341
3342 if (error) {
3343 while (--i >= 0)
3344 device_remove_file(con->dev, &device_attrs[i]);
3345 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3346 }
3347
3348 return error;
3349 }
3350
3351 static void vtconsole_deinit_device(struct con_driver *con)
3352 {
3353 int i;
3354
3355 if (con->flag & CON_DRIVER_FLAG_ATTR) {
3356 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3357 device_remove_file(con->dev, &device_attrs[i]);
3358 con->flag &= ~CON_DRIVER_FLAG_ATTR;
3359 }
3360 }
3361
3362 /**
3363 * con_is_bound - checks if driver is bound to the console
3364 * @csw: console driver
3365 *
3366 * RETURNS: zero if unbound, nonzero if bound
3367 *
3368 * Drivers can call this and if zero, they should release
3369 * all resources allocated on con_startup()
3370 */
3371 int con_is_bound(const struct consw *csw)
3372 {
3373 int i, bound = 0;
3374
3375 for (i = 0; i < MAX_NR_CONSOLES; i++) {
3376 if (con_driver_map[i] == csw) {
3377 bound = 1;
3378 break;
3379 }
3380 }
3381
3382 return bound;
3383 }
3384 EXPORT_SYMBOL(con_is_bound);
3385
3386 /**
3387 * register_con_driver - register console driver to console layer
3388 * @csw: console driver
3389 * @first: the first console to take over, minimum value is 0
3390 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
3391 *
3392 * DESCRIPTION: This function registers a console driver which can later
3393 * bind to a range of consoles specified by @first and @last. It will
3394 * also initialize the console driver by calling con_startup().
3395 */
3396 int register_con_driver(const struct consw *csw, int first, int last)
3397 {
3398 struct module *owner = csw->owner;
3399 struct con_driver *con_driver;
3400 const char *desc;
3401 int i, retval = 0;
3402
3403 if (!try_module_get(owner))
3404 return -ENODEV;
3405
3406 acquire_console_sem();
3407
3408 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3409 con_driver = &registered_con_driver[i];
3410
3411 /* already registered */
3412 if (con_driver->con == csw)
3413 retval = -EINVAL;
3414 }
3415
3416 if (retval)
3417 goto err;
3418
3419 desc = csw->con_startup();
3420
3421 if (!desc)
3422 goto err;
3423
3424 retval = -EINVAL;
3425
3426 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3427 con_driver = &registered_con_driver[i];
3428
3429 if (con_driver->con == NULL) {
3430 con_driver->con = csw;
3431 con_driver->desc = desc;
3432 con_driver->node = i;
3433 con_driver->flag = CON_DRIVER_FLAG_MODULE |
3434 CON_DRIVER_FLAG_INIT;
3435 con_driver->first = first;
3436 con_driver->last = last;
3437 retval = 0;
3438 break;
3439 }
3440 }
3441
3442 if (retval)
3443 goto err;
3444
3445 con_driver->dev = device_create(vtconsole_class, NULL,
3446 MKDEV(0, con_driver->node),
3447 NULL, "vtcon%i",
3448 con_driver->node);
3449
3450 if (IS_ERR(con_driver->dev)) {
3451 printk(KERN_WARNING "Unable to create device for %s; "
3452 "errno = %ld\n", con_driver->desc,
3453 PTR_ERR(con_driver->dev));
3454 con_driver->dev = NULL;
3455 } else {
3456 vtconsole_init_device(con_driver);
3457 }
3458
3459 err:
3460 release_console_sem();
3461 module_put(owner);
3462 return retval;
3463 }
3464 EXPORT_SYMBOL(register_con_driver);
3465
3466 /**
3467 * unregister_con_driver - unregister console driver from console layer
3468 * @csw: console driver
3469 *
3470 * DESCRIPTION: All drivers that registers to the console layer must
3471 * call this function upon exit, or if the console driver is in a state
3472 * where it won't be able to handle console services, such as the
3473 * framebuffer console without loaded framebuffer drivers.
3474 *
3475 * The driver must unbind first prior to unregistration.
3476 */
3477 int unregister_con_driver(const struct consw *csw)
3478 {
3479 int i, retval = -ENODEV;
3480
3481 acquire_console_sem();
3482
3483 /* cannot unregister a bound driver */
3484 if (con_is_bound(csw))
3485 goto err;
3486
3487 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3488 struct con_driver *con_driver = &registered_con_driver[i];
3489
3490 if (con_driver->con == csw &&
3491 con_driver->flag & CON_DRIVER_FLAG_MODULE) {
3492 vtconsole_deinit_device(con_driver);
3493 device_destroy(vtconsole_class,
3494 MKDEV(0, con_driver->node));
3495 con_driver->con = NULL;
3496 con_driver->desc = NULL;
3497 con_driver->dev = NULL;
3498 con_driver->node = 0;
3499 con_driver->flag = 0;
3500 con_driver->first = 0;
3501 con_driver->last = 0;
3502 retval = 0;
3503 break;
3504 }
3505 }
3506 err:
3507 release_console_sem();
3508 return retval;
3509 }
3510 EXPORT_SYMBOL(unregister_con_driver);
3511
3512 /*
3513 * If we support more console drivers, this function is used
3514 * when a driver wants to take over some existing consoles
3515 * and become default driver for newly opened ones.
3516 *
3517 * take_over_console is basically a register followed by unbind
3518 */
3519 int take_over_console(const struct consw *csw, int first, int last, int deflt)
3520 {
3521 int err;
3522
3523 err = register_con_driver(csw, first, last);
3524
3525 if (!err)
3526 bind_con_driver(csw, first, last, deflt);
3527
3528 return err;
3529 }
3530
3531 /*
3532 * give_up_console is a wrapper to unregister_con_driver. It will only
3533 * work if driver is fully unbound.
3534 */
3535 void give_up_console(const struct consw *csw)
3536 {
3537 unregister_con_driver(csw);
3538 }
3539
3540 static int __init vtconsole_class_init(void)
3541 {
3542 int i;
3543
3544 vtconsole_class = class_create(THIS_MODULE, "vtconsole");
3545 if (IS_ERR(vtconsole_class)) {
3546 printk(KERN_WARNING "Unable to create vt console class; "
3547 "errno = %ld\n", PTR_ERR(vtconsole_class));
3548 vtconsole_class = NULL;
3549 }
3550
3551 /* Add system drivers to sysfs */
3552 for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
3553 struct con_driver *con = &registered_con_driver[i];
3554
3555 if (con->con && !con->dev) {
3556 con->dev = device_create(vtconsole_class, NULL,
3557 MKDEV(0, con->node),
3558 NULL, "vtcon%i",
3559 con->node);
3560
3561 if (IS_ERR(con->dev)) {
3562 printk(KERN_WARNING "Unable to create "
3563 "device for %s; errno = %ld\n",
3564 con->desc, PTR_ERR(con->dev));
3565 con->dev = NULL;
3566 } else {
3567 vtconsole_init_device(con);
3568 }
3569 }
3570 }
3571
3572 return 0;
3573 }
3574 postcore_initcall(vtconsole_class_init);
3575
3576 #endif
3577
3578 /*
3579 * Screen blanking
3580 */
3581
3582 static int set_vesa_blanking(char __user *p)
3583 {
3584 unsigned int mode;
3585
3586 if (get_user(mode, p + 1))
3587 return -EFAULT;
3588
3589 vesa_blank_mode = (mode < 4) ? mode : 0;
3590 return 0;
3591 }
3592
3593 void do_blank_screen(int entering_gfx)
3594 {
3595 struct vc_data *vc = vc_cons[fg_console].d;
3596 int i;
3597
3598 WARN_CONSOLE_UNLOCKED();
3599
3600 if (console_blanked) {
3601 if (blank_state == blank_vesa_wait) {
3602 blank_state = blank_off;
3603 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
3604 }
3605 return;
3606 }
3607
3608 /* entering graphics mode? */
3609 if (entering_gfx) {
3610 hide_cursor(vc);
3611 save_screen(vc);
3612 vc->vc_sw->con_blank(vc, -1, 1);
3613 console_blanked = fg_console + 1;
3614 blank_state = blank_off;
3615 set_origin(vc);
3616 return;
3617 }
3618
3619 if (blank_state != blank_normal_wait)
3620 return;
3621 blank_state = blank_off;
3622
3623 /* don't blank graphics */
3624 if (vc->vc_mode != KD_TEXT) {
3625 console_blanked = fg_console + 1;
3626 return;
3627 }
3628
3629 hide_cursor(vc);
3630 del_timer_sync(&console_timer);
3631 blank_timer_expired = 0;
3632
3633 save_screen(vc);
3634 /* In case we need to reset origin, blanking hook returns 1 */
3635 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
3636 console_blanked = fg_console + 1;
3637 if (i)
3638 set_origin(vc);
3639
3640 if (console_blank_hook && console_blank_hook(1))
3641 return;
3642
3643 if (vesa_off_interval && vesa_blank_mode) {
3644 blank_state = blank_vesa_wait;
3645 mod_timer(&console_timer, jiffies + vesa_off_interval);
3646 }
3647 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
3648 }
3649 EXPORT_SYMBOL(do_blank_screen);
3650
3651 /*
3652 * Called by timer as well as from vt_console_driver
3653 */
3654 void do_unblank_screen(int leaving_gfx)
3655 {
3656 struct vc_data *vc;
3657
3658 /* This should now always be called from a "sane" (read: can schedule)
3659 * context for the sake of the low level drivers, except in the special
3660 * case of oops_in_progress
3661 */
3662 if (!oops_in_progress)
3663 might_sleep();
3664
3665 WARN_CONSOLE_UNLOCKED();
3666
3667 ignore_poke = 0;
3668 if (!console_blanked)
3669 return;
3670 if (!vc_cons_allocated(fg_console)) {
3671 /* impossible */
3672 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1);
3673 return;
3674 }
3675 vc = vc_cons[fg_console].d;
3676 if (vc->vc_mode != KD_TEXT)
3677 return; /* but leave console_blanked != 0 */
3678
3679 if (blankinterval) {
3680 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3681 blank_state = blank_normal_wait;
3682 }
3683
3684 console_blanked = 0;
3685 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
3686 /* Low-level driver cannot restore -> do it ourselves */
3687 update_screen(vc);
3688 if (console_blank_hook)
3689 console_blank_hook(0);
3690 set_palette(vc);
3691 set_cursor(vc);
3692 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
3693 }
3694 EXPORT_SYMBOL(do_unblank_screen);
3695
3696 /*
3697 * This is called by the outside world to cause a forced unblank, mostly for
3698 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
3699 * call it with 1 as an argument and so force a mode restore... that may kill
3700 * X or at least garbage the screen but would also make the Oops visible...
3701 */
3702 void unblank_screen(void)
3703 {
3704 do_unblank_screen(0);
3705 }
3706
3707 /*
3708 * We defer the timer blanking to work queue so it can take the console mutex
3709 * (console operations can still happen at irq time, but only from printk which
3710 * has the console mutex. Not perfect yet, but better than no locking
3711 */
3712 static void blank_screen_t(unsigned long dummy)
3713 {
3714 if (unlikely(!keventd_up())) {
3715 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3716 return;
3717 }
3718 blank_timer_expired = 1;
3719 schedule_work(&console_work);
3720 }
3721
3722 void poke_blanked_console(void)
3723 {
3724 WARN_CONSOLE_UNLOCKED();
3725
3726 /* Add this so we quickly catch whoever might call us in a non
3727 * safe context. Nowadays, unblank_screen() isn't to be called in
3728 * atomic contexts and is allowed to schedule (with the special case
3729 * of oops_in_progress, but that isn't of any concern for this
3730 * function. --BenH.
3731 */
3732 might_sleep();
3733
3734 /* This isn't perfectly race free, but a race here would be mostly harmless,
3735 * at worse, we'll do a spurrious blank and it's unlikely
3736 */
3737 del_timer(&console_timer);
3738 blank_timer_expired = 0;
3739
3740 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
3741 return;
3742 if (console_blanked)
3743 unblank_screen();
3744 else if (blankinterval) {
3745 mod_timer(&console_timer, jiffies + (blankinterval * HZ));
3746 blank_state = blank_normal_wait;
3747 }
3748 }
3749
3750 /*
3751 * Palettes
3752 */
3753
3754 static void set_palette(struct vc_data *vc)
3755 {
3756 WARN_CONSOLE_UNLOCKED();
3757
3758 if (vc->vc_mode != KD_GRAPHICS)
3759 vc->vc_sw->con_set_palette(vc, color_table);
3760 }
3761
3762 static int set_get_cmap(unsigned char __user *arg, int set)
3763 {
3764 int i, j, k;
3765
3766 WARN_CONSOLE_UNLOCKED();
3767
3768 for (i = 0; i < 16; i++)
3769 if (set) {
3770 get_user(default_red[i], arg++);
3771 get_user(default_grn[i], arg++);
3772 get_user(default_blu[i], arg++);
3773 } else {
3774 put_user(default_red[i], arg++);
3775 put_user(default_grn[i], arg++);
3776 put_user(default_blu[i], arg++);
3777 }
3778 if (set) {
3779 for (i = 0; i < MAX_NR_CONSOLES; i++)
3780 if (vc_cons_allocated(i)) {
3781 for (j = k = 0; j < 16; j++) {
3782 vc_cons[i].d->vc_palette[k++] = default_red[j];
3783 vc_cons[i].d->vc_palette[k++] = default_grn[j];
3784 vc_cons[i].d->vc_palette[k++] = default_blu[j];
3785 }
3786 set_palette(vc_cons[i].d);
3787 }
3788 }
3789 return 0;
3790 }
3791
3792 /*
3793 * Load palette into the DAC registers. arg points to a colour
3794 * map, 3 bytes per colour, 16 colours, range from 0 to 255.
3795 */
3796
3797 int con_set_cmap(unsigned char __user *arg)
3798 {
3799 int rc;
3800
3801 acquire_console_sem();
3802 rc = set_get_cmap (arg,1);
3803 release_console_sem();
3804
3805 return rc;
3806 }
3807
3808 int con_get_cmap(unsigned char __user *arg)
3809 {
3810 int rc;
3811
3812 acquire_console_sem();
3813 rc = set_get_cmap (arg,0);
3814 release_console_sem();
3815
3816 return rc;
3817 }
3818
3819 void reset_palette(struct vc_data *vc)
3820 {
3821 int j, k;
3822 for (j=k=0; j<16; j++) {
3823 vc->vc_palette[k++] = default_red[j];
3824 vc->vc_palette[k++] = default_grn[j];
3825 vc->vc_palette[k++] = default_blu[j];
3826 }
3827 set_palette(vc);
3828 }
3829
3830 /*
3831 * Font switching
3832 *
3833 * Currently we only support fonts up to 32 pixels wide, at a maximum height
3834 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
3835 * depending on width) reserved for each character which is kinda wasty, but
3836 * this is done in order to maintain compatibility with the EGA/VGA fonts. It
3837 * is upto the actual low-level console-driver convert data into its favorite
3838 * format (maybe we should add a `fontoffset' field to the `display'
3839 * structure so we won't have to convert the fontdata all the time.
3840 * /Jes
3841 */
3842
3843 #define max_font_size 65536
3844
3845 static int con_font_get(struct vc_data *vc, struct console_font_op *op)
3846 {
3847 struct console_font font;
3848 int rc = -EINVAL;
3849 int c;
3850
3851 if (vc->vc_mode != KD_TEXT)
3852 return -EINVAL;
3853
3854 if (op->data) {
3855 font.data = kmalloc(max_font_size, GFP_KERNEL);
3856 if (!font.data)
3857 return -ENOMEM;
3858 } else
3859 font.data = NULL;
3860
3861 acquire_console_sem();
3862 if (vc->vc_sw->con_font_get)
3863 rc = vc->vc_sw->con_font_get(vc, &font);
3864 else
3865 rc = -ENOSYS;
3866 release_console_sem();
3867
3868 if (rc)
3869 goto out;
3870
3871 c = (font.width+7)/8 * 32 * font.charcount;
3872
3873 if (op->data && font.charcount > op->charcount)
3874 rc = -ENOSPC;
3875 if (!(op->flags & KD_FONT_FLAG_OLD)) {
3876 if (font.width > op->width || font.height > op->height)
3877 rc = -ENOSPC;
3878 } else {
3879 if (font.width != 8)
3880 rc = -EIO;
3881 else if ((op->height && font.height > op->height) ||
3882 font.height > 32)
3883 rc = -ENOSPC;
3884 }
3885 if (rc)
3886 goto out;
3887
3888 op->height = font.height;
3889 op->width = font.width;
3890 op->charcount = font.charcount;
3891
3892 if (op->data && copy_to_user(op->data, font.data, c))
3893 rc = -EFAULT;
3894
3895 out:
3896 kfree(font.data);
3897 return rc;
3898 }
3899
3900 static int con_font_set(struct vc_data *vc, struct console_font_op *op)
3901 {
3902 struct console_font font;
3903 int rc = -EINVAL;
3904 int size;
3905
3906 if (vc->vc_mode != KD_TEXT)
3907 return -EINVAL;
3908 if (!op->data)
3909 return -EINVAL;
3910 if (op->charcount > 512)
3911 return -EINVAL;
3912 if (!op->height) { /* Need to guess font height [compat] */
3913 int h, i;
3914 u8 __user *charmap = op->data;
3915 u8 tmp;
3916
3917 /* If from KDFONTOP ioctl, don't allow things which can be done in userland,
3918 so that we can get rid of this soon */
3919 if (!(op->flags & KD_FONT_FLAG_OLD))
3920 return -EINVAL;
3921 for (h = 32; h > 0; h--)
3922 for (i = 0; i < op->charcount; i++) {
3923 if (get_user(tmp, &charmap[32*i+h-1]))
3924 return -EFAULT;
3925 if (tmp)
3926 goto nonzero;
3927 }
3928 return -EINVAL;
3929 nonzero:
3930 op->height = h;
3931 }
3932 if (op->width <= 0 || op->width > 32 || op->height > 32)
3933 return -EINVAL;
3934 size = (op->width+7)/8 * 32 * op->charcount;
3935 if (size > max_font_size)
3936 return -ENOSPC;
3937 font.charcount = op->charcount;
3938 font.height = op->height;
3939 font.width = op->width;
3940 font.data = kmalloc(size, GFP_KERNEL);
3941 if (!font.data)
3942 return -ENOMEM;
3943 if (copy_from_user(font.data, op->data, size)) {
3944 kfree(font.data);
3945 return -EFAULT;
3946 }
3947 acquire_console_sem();
3948 if (vc->vc_sw->con_font_set)
3949 rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
3950 else
3951 rc = -ENOSYS;
3952 release_console_sem();
3953 kfree(font.data);
3954 return rc;
3955 }
3956
3957 static int con_font_default(struct vc_data *vc, struct console_font_op *op)
3958 {
3959 struct console_font font = {.width = op->width, .height = op->height};
3960 char name[MAX_FONT_NAME];
3961 char *s = name;
3962 int rc;
3963
3964 if (vc->vc_mode != KD_TEXT)
3965 return -EINVAL;
3966
3967 if (!op->data)
3968 s = NULL;
3969 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
3970 return -EFAULT;
3971 else
3972 name[MAX_FONT_NAME - 1] = 0;
3973
3974 acquire_console_sem();
3975 if (vc->vc_sw->con_font_default)
3976 rc = vc->vc_sw->con_font_default(vc, &font, s);
3977 else
3978 rc = -ENOSYS;
3979 release_console_sem();
3980 if (!rc) {
3981 op->width = font.width;
3982 op->height = font.height;
3983 }
3984 return rc;
3985 }
3986
3987 static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
3988 {
3989 int con = op->height;
3990 int rc;
3991
3992 if (vc->vc_mode != KD_TEXT)
3993 return -EINVAL;
3994
3995 acquire_console_sem();
3996 if (!vc->vc_sw->con_font_copy)
3997 rc = -ENOSYS;
3998 else if (con < 0 || !vc_cons_allocated(con))
3999 rc = -ENOTTY;
4000 else if (con == vc->vc_num) /* nothing to do */
4001 rc = 0;
4002 else
4003 rc = vc->vc_sw->con_font_copy(vc, con);
4004 release_console_sem();
4005 return rc;
4006 }
4007
4008 int con_font_op(struct vc_data *vc, struct console_font_op *op)
4009 {
4010 switch (op->op) {
4011 case KD_FONT_OP_SET:
4012 return con_font_set(vc, op);
4013 case KD_FONT_OP_GET:
4014 return con_font_get(vc, op);
4015 case KD_FONT_OP_SET_DEFAULT:
4016 return con_font_default(vc, op);
4017 case KD_FONT_OP_COPY:
4018 return con_font_copy(vc, op);
4019 }
4020 return -ENOSYS;
4021 }
4022
4023 /*
4024 * Interface exported to selection and vcs.
4025 */
4026
4027 /* used by selection */
4028 u16 screen_glyph(struct vc_data *vc, int offset)
4029 {
4030 u16 w = scr_readw(screenpos(vc, offset, 1));
4031 u16 c = w & 0xff;
4032
4033 if (w & vc->vc_hi_font_mask)
4034 c |= 0x100;
4035 return c;
4036 }
4037 EXPORT_SYMBOL_GPL(screen_glyph);
4038
4039 /* used by vcs - note the word offset */
4040 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed)
4041 {
4042 return screenpos(vc, 2 * w_offset, viewed);
4043 }
4044
4045 void getconsxy(struct vc_data *vc, unsigned char *p)
4046 {
4047 p[0] = vc->vc_x;
4048 p[1] = vc->vc_y;
4049 }
4050
4051 void putconsxy(struct vc_data *vc, unsigned char *p)
4052 {
4053 hide_cursor(vc);
4054 gotoxy(vc, p[0], p[1]);
4055 set_cursor(vc);
4056 }
4057
4058 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org)
4059 {
4060 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
4061 return softcursor_original;
4062 return scr_readw(org);
4063 }
4064
4065 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
4066 {
4067 scr_writew(val, org);
4068 if ((unsigned long)org == vc->vc_pos) {
4069 softcursor_original = -1;
4070 add_softcursor(vc);
4071 }
4072 }
4073
4074 /*
4075 * Visible symbols for modules
4076 */
4077
4078 EXPORT_SYMBOL(color_table);
4079 EXPORT_SYMBOL(default_red);
4080 EXPORT_SYMBOL(default_grn);
4081 EXPORT_SYMBOL(default_blu);
4082 EXPORT_SYMBOL(update_region);
4083 EXPORT_SYMBOL(redraw_screen);
4084 EXPORT_SYMBOL(vc_resize);
4085 EXPORT_SYMBOL(fg_console);
4086 EXPORT_SYMBOL(console_blank_hook);
4087 EXPORT_SYMBOL(console_blanked);
4088 EXPORT_SYMBOL(vc_cons);
4089 EXPORT_SYMBOL(global_cursor_default);
4090 #ifndef VT_SINGLE_DRIVER
4091 EXPORT_SYMBOL(take_over_console);
4092 EXPORT_SYMBOL(give_up_console);
4093 #endif
Linux with added FPC-III support